Since December 2018, I've been using Algo Signals. I've purchased and sold a variety of coins, as well as removed bitcoins from my wallet. I have not attempted to withdraw any other currency, but I am certain that it is possible. Algo Signals has many degrees of "authorization" or "membership." If you want to exchange millions of money, you'll need to convince them that your credentials are flawless, but I believe that for the vast majority of people, you'll need to upload a passport photo, proof of address, link a bank account to your account, and check your cell phone number. To withdraw money, I had to allow two-factor authentication, which some people could find inconvenient but in my opinion, this authentication process is more secured and I would like to have that to make sure my money is in safe place.