both are good, but if you do intend to make more money, then investment will be the best decision. even more so if investing into bitcoin. many predict that bitcoin prices will reach $ 20k, so maybe you get that price.
It involves risk and should be done with careful investigation before investing. Some investments are promising too much which in the end sometimes cannot be fulfilled. Investing in your own business would be better, you'll know why you fail and learn, the next time you do it again, you will surely earn, than investing in other investments owned and operated by other people you'll learn, but for sure, the next time you'll be hesitant to invest again.