If either the european union or united states default on deficit/debt. Going the traditional investment route could be bad if the euro/dollar implode. Either bitcoin or alts could be a safer investment than stocks. The DOW average declining could be considered evidence of this: savvy investors may be selling their long term HODL holdings in anticipation of a crash.
It helps to remember very few saw the subprime mortgage crisis coming. No one could remember the value of US real estate declining. Many believed real estate to be a bullet proof investment immune to price corrections or devaluation. As a result, subprime mortgage derivatives were heavily leveraged even as potentially toxic assets which exacerbated the economic & financial damage inflicted when a crash finally came.
It is possible anything denominated in dollars or euros could be described as sinking ships. While banks and others fund anti crypto FUD campaigns labeling bitcoin a "sinking ship which could fall to zero at any time" that description could more accurately describe fiat currencies given the large deficits and politicians insistence on continuing their flawed policy of spending and taxing their way out of debt.
Also in regard to Vitalik Buterin some might find the following interesting.
This is what goldman sachs says:
https://www.cnbc.com/2018/02/07/most-cryptocurrencies-will-crash-to-zero-goldman-sachs-says.html
This is what Vitalik Buterin says:
https://www.cnbc.com/2018/02/19/ethereum-creator-vitalik-buterin-warns-about-cryptocurrency-investment.html
Is it interesting how they both repeat near to an identical message?
Where's the diversity of opinion and views they love to preach about?