The virtual wallet is where you keep the money you top up your account; you need to top up the wallet to use the service. The cost of trips and bookings will be deducted from this wallet.
You will need a minimum balance of €0.70 for Pay As You Go and €0.50 for a monthly or annual subscription to be able to open a trip.
You can top it up whenever you want via the app or the website.
The amount you have in the virtual wallet will not be lost if a plan is cancelled or if you switch between different types of plan. The only case in which the money would be lost is when the user account is deleted.