This is all hypothetical. So let’s say there is Buyer A (John) and Buyer B (Mike). John buys $1,000 worth of  altcoin on February 2018 and holds. Mike buys $1,000 worth of the same Altcoin as well but he buys it 10 months later on December 2018.  On February 2018, the coin’s price was $1.50. From then until December, the coin’s price has fluctuated a lot going from $1.50 to $15 back to $1.50, back to $15, then skyrockets to $50, back to $15, a bunch of phases going up and down both slowly/rapidly, and it’s eventually back to $1.50 in December. Literally couple days after Mike buys the coin priced at $1.50, the coin skyrockets back to $50. Who will have made more profit, John or Mike?