Need advice Asap

I’ve allocated some money for swing trading and I am doing a decent job and also some for long-term investments, but I’m feeling conflicted. I invested in a stock that has performed exceptionally well in just three months(60 percent gain). Now, I’m unsure whether to cash out completely, as I don't want to witness a potential drop from its all-time high(coz it has to go down it's overvalued asf now). However, since this was meant to be a long-term investment, selling it so soon doesn’t feel justified. Any suggestions what to do?