now a lot of investors are investing in bitcoin, therefore bitcoin has increased very rapidly, if bitcoin decreased what should be done?, whether the investors will lose?
The best thing to do when bitcoin decreases is always hold and wait for the price to increase. In this way, you are not stripping yourself of the chance at a price increase and most importantly, you are not putting bitcoin's survival in danger. If you could buy more coins then buy more, but if you couldn't, then don't sell. Just hold.