Indeed, the only thing a 51% attacker could really accomplish is destroying collective faith in bitcoin. They couldn’t somehow steal and gain all the value of bitcoins for itself. The attacker wouldn’t be able to generate new bitcoins on demand arbitrarily, and would still have to mine for them. They also would have no control over taking bitcoins created in the past that didn’t belong to them. The only thing they could do, really, is repeatedly spend bitcoin they already owned again and again, but even this is limited in its value, because ‘honest’ miner nodes would never accept these fraudulent payments.
Be sure to have a positive confidence in the cryptocurrency you invest in. If you are investing in Bitcoin, then you only buy Bitcoin. No matter how big the Altcoins are, besides Bitcoin, you only have Bitcoin in your eyes. siacoin price in usd, no matter how it changes, you must be firm in your initial decision. In other words, investing in Bitcoin and ah should not give you the most revenue, but it may be the most stable investment method in cryptocurrency investment.
It will micro crash many times, and almost certainly there will be a significant crash but timing this will be difficult. The market could crash tomorrow, in a week, in a month or two years. When it does, it could be 30%, 50% or even 80%. The crash could happen very quickly or drag on slowly over a more extended period. While I don’t expect a 2-year bear market like durung 2013/14, one is entirely possible. I think the market dynamics are very different from the last bear market, where the ecosystem was in its infancy.
On the other hand, with bitcoin, I wouldn’t have to trust anyone at all. I would know for certain that my coins wouldn’t lose their value due to inflation as a consequence of their designed and indelible scarcity. I would also know that as I stored my coins myself, no one else, not even a bank, could actually go and spend 90% of my money, and fail to give it back to me in the event of a bank run. Furthermore, no one could forcibly confiscate my money under any circumstances, as I could always store it in such a way that it could never be retrieved except with my consent. No one would even necessarily be able to know how much money I held, unless I chose to make that information public.
As a general rule, what goes up can come down, and what goes up particularly quickly is privy to come down just as quickly. This is not to say that things will come down if they go up, but merely that they can, and certainly have before. This is particularly noteworthy today, with ethereum having seen some truly wild gains this year, all the way up from $7 back in December of last year to over $350 presently — a gain of 50X in just about half a year. Again, this isn’t to say ethereum will fall, but merely that it very well might, for any host of reasons, and it’s very important to keep this fact in mind and not overextend yourself with investments you perceive to be less volatile than they truly are. I’ll get back to this more later.
While Goldman Sachs’ skeptical stance on crypto “remains intact,” the investment bank’s CEO Lloyd Blankfein has suggested that the adoption of crypto like Bitcoin could happen in a similar way as that of paper money, which replaced gold and silver coins. In an interview in June, Blankfein stated that it is “too arrogant” to argue that crypto cannot be adopted on a large scale only because it is “uncomfortable” or “unfamiliar.”
Steindorff: Litecoin. LTC taught us a very valuable lesson about the strength of a brand and its corresponding community. We missed the boat on LTC early on because we felt that its use case overlapped too heavily with BTC. It was hard to imagine that LTC could gain any significant market share from its dominant predecessor but despite our beliefs, Litecoin’s brand and community have driven it to become a top 10 cryptocurrency with a lot of volume and liquidity. The lesson here was that the power of a trusted brand and a devoted community has the ability to outweigh innovative tech. 
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