As an investor in crypto I understand what Mark is saying, remember that this is just his opinion and what he thinks, he never states it as a fact. And it is really common sense in the finance market that "When everyone is greedy be fearful." So be careful and have a plan before you go blindy into crypto, nobody can say for sure what the future holds.
That being said I am sure that crypto currency based on the block chain is the future. However it is hard to say which of them will be a winner. Personally i like Ethereum which is not really currency even if everyone treats it like bitcoin 2.0. My tip: Study for yourself both sides of the coin, do not only look at one side of the case, do not fall into the trap that is Confirmation bias
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Millionaire Shortcuts: Money should just be a byproduct of your goals in life