Firstly, that should be nothing is impossible in the crypto world, and secondly it is just a normal saying based on experience and not a proverb as you said it. That is a sentence that I am sure is clear to even my 2 year old kid. Market can grow outrageously in the long run and however it tends to is best known with time as no one can predict the future but in this case, and as some people have mentioned it, it seems to be a lot to wrap one's head around, considering the level at which the market cap will be in such scenario

20 seems reasonable time period to have such a big growth. We also have to understand that not everyone globally is absolutely going to end up being in this space, as some will be limited, accessible to some, and it would be a personal decision for some. Also in this case, we are talking about the whole world moving into the crypto space, with a market cap like this, and I wonder how that in itself is really going to work out. Do we even have up to 204 trillion dollar in the whole global market?