The popular choices I know and hear from people are Binance, Blockchain and Freewallet. Which one should I choose?
If you want to store your Bitcoin Assets later, you should use an official platform. the options you mentioned maybe they are global options so far, but don't use a centralized exchange site to store your Bitcoin assets, if the quantity is large we recommend you to try to get a hardware wallet, for example like Electrum they say so far very safe. maybe there are some other trusted secure hardware wallets you can try.