I don't think that everyone investing only in crypto, i would rather say, most of us here are investing only in crypto and reasons why are: easy entrance into market unlike stocks market and higher reward for higher risk.
i think investors only put few money on cryptocurrency market.and maybe it less than 20% from total their assset.investors worry if they put most of their asset on high risk market.
Yes, that would be great percent of crypto investments in our portfolio, but most of us (here) do not have enough money for investing in other investments.
To have significantly return on investment, we have to buy cryptocurrencies with high risk.
cryptocurrency market really give us high return, but it contain high risk too.if we dont have knowledge to manage this risk, we could loss all of our money.we should have to avoid it.