What do you think will happen tomorrow with the BTC (up or down?) if the stock markets worldwide crash again?
If the stock market crash most probably crypto market is affected as well just like what happened recently due to covid-19.
I dont know what i should do today, sell all my altcoins?
The prices of altcoins are somehow recover today. Is that enough for you? If you're contented with the profit you can get then its up to you if you want to sell your alts already. But I think its better to wait further until there's a massive pump happen. We are still in the first quarter and many possible things that can happen unexpectedly so i'd rather wait than sell at this point.