I think that this is a great strategy, and personally practice it with a few modifications. While I’ll never sell at any price essentially (unlike other investments, bitcoin and cryptocurrencies are unique in that they arecurrencies, and consequently if they succeed, you won’t have to sell them to gain value from them. You can just use them directly, just as you might US dollars or any other form of currency. In the manner that I use the word sell here however, I mean that I likely won’t sell at any price under $100,000, as that’s where I personally see the moonshot value of bitcoin going towards, in the slight chance that it does succeed), no matter how high the price rises in the short term, if and when the price becomes particularly low as a result of a cratering market, I will look to buy more than I normally would, to double down on my investment here — all the while keeping in mind never to invest more than I’m perfectly willing to lose entirely.
Again, while this all seems incredibly far-fetched today for most people (but not all, as the present day European migrant crisis has made abundantly clear), it happens much more often than one might expect. A little remembered fact is that the United States itself once outlawed the possession of gold, back in 1933 with Executive Order 6102, and forced all its citizens to relinquish all gold to the United States at a fixed price of $20.67 per troy ounce.

Nevertheless, NVIDIA and AMD aren't absolved from downside, either. In fact, you could say the two are stuck in a pervasive cryptocurrency conundrum. As a result of the high demand for GPUs, graphics card prices have shot through the roof. In doing so, it's angered their core gaming customers, who are being forced to pay significant premiums for graphics cards at the moment. These companies could risk alienating their core customer and do nothing or they could create a GPU specific for miners, hurting the growth they've received from miners by increasing supply. 
You should look for projects that have good long-term fundamentals. Assessing a project based on its vision, the problems it is trying to solve and the quality of its developing team is vital in understanding whether the project has great prospects. Good projects will tend to achieve their objectives and deliverables, which will, in turn, be reflected in an appreciation of their token’s price over the long-term. (See more: Coins, Tokens & Altcoins: What’s the Difference?)
This, too, is not merely a theoretical matter. Ethereum did indeed hard fork after the DAO hack, and split off into ETH (the current dominant blockchain for ethereum) and ETC (the ‘classic’, or original blockchain for ethereum). As of this time, ETC is worth over $20 a coin — more, in fact, than all of ethereum was worth before the hack. Had I kept my ethereum on Coinbase or another exchange like it at the time of the hard fork, I personally would have lost 5 figures in ETC (at present values) merely because the exchanges wouldn’t give me access to these coins that I rightfully owned.
That doesn't mean it's risk-free, though. Blockchain technology is an intriguing development that could disrupt a number of huge industries, but at the moment, it's also a fashionable word to throw around. Long Island Iced Tea, a beverage company, renamed itself Long Blockchain in late 2017, seemingly knowing that the word itself could cause a jump in stock. And for a brief moment, the stock actually did jump just because of that. Don't fall for tricks like that, stay vigilant and avoid cryptocurrency scams like these.
Ultimately, if you want to make money with crypto you have a couple of options. The easiest thing to do is to build a diversified portfolio of carefully selected coins and then to simply wait a couple of years. However, this is not the most effective way to make mad money. If you want to truly crush it at crypto, you need access to truly knowledgable people.
With things like brain wallets possible, this means that even in the worst case scenario, you can literally store your bitcoins in your brain and nowhere else, and thereby easily prevent their confiscation. Just yet another fundamental innovation in the evolution of currency that bitcoin has made possible — its fully intangible nature is actually an asset.
This is why no fiat currency has ever stood the test of time over a long enough timescale, whereas gold has to date always stood the test of time and retained its value well. Collective trust for gold has never collapsed because of its inherent scarcity and immunity to the vicissitudes fiat currencies must endure at the hands of capricious centralized governing powers, whereas collective trust in every historical fiat currency has inevitably failed to date, and collective trust in many present-day fiat currencies continues to fail as we speak.
No. 2: Cryptocurrencies provide a unique and attractive combination of returns and volatility: Crypto assets are appealing because they enjoy relatively low correlation to other asset classes, like bonds (negative correlation) and gold (zero correlation). In other words, crypto assets can be an ideal way for investors to diversify a portfolio consisting of stocks and bonds. Research shows that a 2 percent exposure to crypto assets in a portfolio could, on average, boost returns by up to 200 bps. Five percent exposure could boost performance by over 500bps, nearly double that of a typical stock/bond blended portfolio. At the same time, active managers seeking retuns better than the market will possibly seek the high volatility of Bitcoin and other digital currencies.