If you need a virtual dollar card that you can easily fund with crypto, then I currently recommend using Onboard Wallet & Cards.
Pros: Easy funding and spending.
Cons: Gas fees for withdrawing funds back to your wallet when using ETH chains like Arbitrum are high. Hence, I recommend using the BSC chain to fund your wallet, card, and also withdraw from it.
Join me and many others using Onboard to make their money borderless. Sign up with my link and earn a reward: https://wallet.onboard.xyz/2Aw2erd8ArfexNn57
Can I use it to buy usdt online, with naira?
I haven’t tried it but it should be able to buy crypto in USD.
Besides, are you aware you’re funding the VISA card with crypto? Hence you can also withdraw backto crypto instead of using itti buy crypto again.
How to withdraw?