Congratulations. Back in 2016-2017 I could have bought bitcoin for cheaper price but I didn't. Instead if bought some altercoins. I think I made a bad decision.
If you had started investing in Bitcoin since then, it seems you would have been one of the lucky ones. Yes if you had invested in bitcoins between 2016 and 2017 you would have owned a lot of money by now. In 2016 to 2017, the price of Bitcoin was much lower than it is today, when the price of Bitcoin was only between $963 and $1500. Since then, the price of Bitcoin has increased by almost 100% to its current value of $43,000.Bitcoin price will increase as time goes by. You can start investing in Bitcoin right now if you want.