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yes but bitcoin is still the ocean everything floats on so whenever it crashes it takes any coin with it, whenever there are bearish days on the market out of the 1000++ currencies only 5-10 are on a upward trajectory, to contrast whenever things are business as usual there are 50-100 coins on the negative for the day

because bitcoin (and ethereum as for now) is a household name.
Not for very long in my opinion.

yes, that's true.

PoS has its own set of weaknesses, but a a 51% attack is not part of it. Steem is DPoS, which is a bit different.

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