There isn't really a hundred percent safe place for you to store your assets that could guarantee you a huge profit in a short span of time. Everything takes time. An investment needs time to mature may it be in crypto or other investment vehicles. If someone offers you easy and big return of investment in a snap, probably it is a form of scam.
Any places that "guarantees" you that you will be making a lot of profit will be lying to you. Unfortunately nothing is guaranteed in the crypto world and the sooner we learn this means the sooner we will realize that everything we do in the crypto world has a risk involved as well.
I believe that we are going to have a lot better situation in our hands eventually, it will take some time to get better but since it is a long term project that means if you buy bitcoin and eventually it goes up a lot then we are going to be in profit a lot and that is when it is "guaranteed" if you could put a stop loss at a huge margin as well. It is just "possible" after a long period of waiting.