Funny enough, i had this experience with a friend of mine today, though not bitcoin but an altcoin i invested in because if its potential, he is a newbie, i helped him to convert our local currency to usdt and got it deposited to an exchange where the coin was listed, hes reason for the deposit was to buy the altcoin in question, after the deposit was successful, he lost interest, said he can not buy the coin because the price is going down, i told him to buy it at that time for it was a good opportunity, he refused and i left him alone, about 2 hours later, the same coin began pumping and in a few hours, did about +23 percent, i reached out to him to inquire if he later bought it, he said no, i mockily asked him if he was ready to buy now that the price is going up( since he could not buy earlier because the price was going down ), he said no, that he cant buy it because the price is going up, that he will wait again for price to come back down.
Coin already more than doubled the price it was when i told him to buy, and i  dont think there is anyway the price will ever come back to the amount it was when i told him to buy.. some people will never learn.