Mobile wallets are safer than online wallets, but are still vulnerable to hacks. You will then be asked to select the a fiat currency. So I decided to login thru the website and I finally got in and my account balance was 0 but the icon is showing that it trying to download the information, but it was keeping doing that for long times so i decided to click on the menu i found a refresh button, so click it, and finally my actual account balance appeared as normal. As such, it is best to have active antivirus subscriptions on your devices and to run periodic scans. Best for Free Buying and Selling: Robinhood. All hardware wallets listed above work with other wallets. Before you put a dollar into Bitcoin or any other cryptocurrency , it is important to understand the risks.