you wont be taxed unless you realized your gains. if selling, be mindful of short-term capital gains tax (same as income tax). holding stocks for more than a year then sold at a profit will be taxed less(15%) as long-term capital gains tax applies.

Never sell. Use the “Buy, Borrow, Die” strategy. Learn the basics here. You can do it on M1 Finance and Robinhood. https://m.youtube.com/watch?v=InMrroqCAq0