What do you think will happen tomorrow with the BTC (up or down?) if the stock markets worldwide crash again?
I am afraid that the BTC will then go towards 3k or even less. The altcoins will hit it even harder.
I dont know what i should do today, sell all my altcoins?
I can suggest you to be in USDT and wait for a specific time to buy as much coins as possible. We might experience a major dump soon which would then be followed by a pump and prices would start getting back on routine. There has been high volatility in the price for bitcoins which has even made a lot of positions getting liquidated on bitmex as well as binance and bybit which is continuously driving the price on the dip.
A lot of big traders have already lost funds in trading which has demotivated others and they have maintained a distance from bitcoins in this time and hence the price is getting dumped. We would soon see each of the markets getting back to routine.