The easiest way to add balance to your CS Trade's wallet is by depositing skins or items.
You can also buy balance with real money with a top-up bonus that is currently 50%! You can use many popular payment methods such as:
Debit/Credit cards: VISA, MasterCard, American Express
PayPal
BLIK
Skrill
Neosurf
ZEN
Kinguin vouchers and more