You can deposit funds as often as you wish by logging into your customer area.

The minimum deposit, whether for the first deposit or the following ones, is $/€100.
To be invested, your balance must be greater than or equal to $/€100.
For your first deposit, if you are sending the funds from an exchange, please be aware of the possible fees they will charge you so that we receive a minimum of $/€100.

There is also no limit on your account balance; however, our compliance department may at any time ask you to prove your identity and residence (if this has not already been done)..

Depending on the country, some banks try to limit purchases of crypto-currency.
These restrictions, which are illegal and supposed to protect you, are intended to slow down your movements, which, as you will quickly understand, are not to the liking of banks which see, with the rise of crypto-currency, their business threatened.