Everyone does that more than once in their investment life, a token/ coin / share we think will have a potential having no potential at all and forever stay in a price lower than we brought and another one we thought of having no potential sometimes goes into record breaking percentage profit.

That's why it's always good idea to always have multiple investments, if it's crypto market, multiple coins, with at least few from top 10 from coinmarket, because they always give profit, short term and long term.