Well, you answered your own question... The best long-term investment, I will dare say the safest compared with all others, is BTC! For the next Bitcoin halving, the only thing we can do is stack more sats! You can earn some, if you are investing it's good to buy some dips, like now... but not with the whole amount, wait, maybe it will drop more so you can buy more... in that way you can get more sats for the same money! I am saying that cause I think we will have a turbulent period! It was like that before, and believe it will be the same again, the next two years will be full of up and downs, and I am sure we didn't touch the bottom yet!