Stock market? If the crashing down does not interfere with the crypto market, I will not do anything because I do not have a stock investment.
If the crash impact to the crypto market and bitcoin is crash, I will not sell my bitcoin instead of buying more bitcoin because that will be the best time for me to buy bitcoin and accumulate more bitcoin. If my altcoin is not crash, I will still hold it and not sell because I think some altcoin will increase if bitcoin is down.
I do not think that crypto market and stock market are that much independent from each other. I do not know if it will be opposites or parallel but I know that it will definitely be related somehow. Think about it this way, we may have stocks going down and crypto going up, or we may have stocks going down and crypto going down with it. Those are two very different things. If the stock market crashes and the crypto world crashes with it?
I will definitely buy a lot more crypto, I keep saying this but then when I want to I keep not finding any money to buy, but if I can somehow gather some funds I will buy a lot, because it will recover and I know it. If the stocks go down but crypto goes up? In that case I have to do nothing, I already have a decent portfolio and I will keep that and that's it, I will not do anything else about it to be frank because I will be profiting so what else to do?