Nobody suspected it, you can't just blame people for not seeing how stock markets would be correlated to crypto.
It wasn't really correlated before, why it is now we don't know. However we are in a situation right now when everything loses, not just bitcoin or not just stocks but EVERYTHING is losing, hell even house prices are down right now, HOUSE PRICES, why would a house that worth 100k yesterday would worth 80k today?
I do not understand whats going through peoples minds, I have no clue how this finance crisis things works at all, I am not a financial analyst or anything or I can't even read charts so I don't know why but seriously, right now there is only that small mask type of thing that gained value, aside from that there has been nothing at all.
Previously at this year of 2020, there are a lot of things happened in just this January up to this March and one of this is the market price of the stock market because there is a shocking event happening and that is the spreading of the virus rapidly and some of the investor and play safe and pull their money into fiat currency and use that money to spend into the things they need like foods, clothes and hygiene to avoid the spreading of the virus, until now the market price of the bitcoin fall down into 3.9k dollars and recovering and becomes stable for a while into 5k dollars and from the previous weeks the price again becomes huge because there is an investment that happens and the profit we have today is over 6k dollar price of the bitcoin. Still, we cannot tell what happens next to the market price of the coin because still, it depends on the economy if they are trying to support the use of cryptocurrency and make a lot of contribution to the stock market. It takes time again before becomes stable and reaches the previous market price again.