Did you mean 100% safe without any risk? LOL
Any investment always have a risk, no matter what the asset it is. Especially you're recommending to invest on so called
decentralized finance aka shitcoins.
1. DON'T USE YOUR PERSONAL SAVINGS FOR INVESTMENT - as the saying goes, "invest what you can afford to lose," so set aside money for this purpose.
After I learn and understand how Bitcoin work, I don't have any personal savings on my bank anymore, but it doesn't mean I don't have cash. I still have cash in hands only for my daily expense.