I can almost be certain that the op will not buy sol even if it drops down to $80, it is very easy to say this things but difficult to execute when the opportunity present itself, if for any reason we see sol price at $80 many people won't buy because they will feel it can drop even lower to $40, the market will reverse amidst their internal deliberation and the opportunity will be lost for good. 
Yes, people will think to invest in the other coins that are not increasing as high as they see SOL has already increased. Many people already make a big profit from SOL because many of them bought SOL when the price was still at the lowest price. So instead of waiting for SOL to reaches $80 or even $40, it is better to search for the other coins but if they still believe that SOL will be back to the high price, they will still buy SOL.SOL's price is currently decreasing but waiting for $80? I don't think the OP have the same sentiments when that price level really comes. I do agree with Anonylz, people usually say , they will buy the coin when it goes down to such level but when they are faced with their target price, they will say they can wait and wait for it to go down more up until the coin rises up again and they missed the opportunity. Same old same old. If you believe the coin's potential, you can enter it at anytime and just exit once you got your profits.
