Update overview.md

Author: RoseTheFlower

donations/overview.md

@@ -11,6 +11,12 @@ Your support would be super helpful in making the hard work more sustainable. Th
 ## Cryptocurrencies
 [Here is a guide](https://99bitcoins.com/buy-bitcoin/buy-bitcoin-with-paypal/) on converting PayPal funds into cryptocurrencies.
 
+### Any currencies
+
+<a href="https://nowpayments.io/donation?api_key=BH93XVS-X2H4QTP-KFVSVBW-Y1RQRJ1" target="_blank">
+<img src="https://nowpayments.io/images/embeds/donation-button-white.svg" alt="Crypto donation button by NOWPayments"></a>
+
+### Specific currencies
 
 :coin: Bitcoin address (BTC): 1EHaEsYNaEcRMYG9WrE76shGxP57dsr9Qq