Bitmart you have to send USDT (Tether) I don't believe they take US dollars. One poster in the past said Bitmart was now taking US dollars but I have not seen that. It's a Binance based coin so if you use a swap you would have to use Pancake and have some BNB in a wallet like Metamask. In the past I have funded Coinbase with US dollars and changed that to USDT to send to Bitmart. When I sell coins on Bitmart it sells them to USDT. A pain in the ass and daunting to some but once you have it wired and all the different ways to buy different coins, it gets much easier.
Bitmart has quite a few coins, including many micros. I would just send a whole bunch of UST from Coinbase and just keep it a Bitmart when you are ready to buy. Text a small amount first in case you do it wrong and send the money to a wrong address.
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