The price of bitcoin will not fall as deeply as it did in 2018, if only because a society of old bitcoin holders has already formed, who are confident that after any fall, it will not only recover in price, but also rise in price even higher. This is, of course, a controversial issue, but this opinion is very popular.
You should not rely heavily on institutional investors, because these are the same business structures, only large ones. They also invest in bitcoin for profit and can also dump it quickly if the market situation changes.