Never heard of them, Coinbase is the most secure imo.
Best way to buy the Trump coin is to download Jupiter App and you can use Apple pay to buy Solana then you swap Solana for the Trump coin, pretty easy tbf. (make sure you get the right contract though for the Trump coin)
https://apps.apple.com/us/app/jupiter-mobile/id6484069059
https://coinmarketcap.com/currencies/official-trump/