But why we can't think like this. If BTC go under 100$, Then most people can buy btc. Because that price is not high. So will that bulk of buying orders hardly affect for a rise up?
Do you really think that their will be buyers. As per my guess even if Bitcoin price goes below $1000 , their will be huge selling and within minutes the bitcoin can even touch $10 also as 99% of them will try to sell it on any price.
Yes, if Bitcoin drops in price to one hundred dollars, most of its holders will panic and will reset their Bitcoins at any price. Panic will be huge. However, if the level of Bitcoin capitalization falls to the level of other cryptocurrency capitalization, this can revive the market very much, since it will no longer contain the price of cryptocurrency.