I started off with 2 cards, a Visa and a Mastercard, but they were both inked to the same fixed deposit guarantee amount. I seemed to only use the one so one year never renewed the Visa one. I have used the MC quite a bit in Thailand without issue, but I admit to being fearful of fraud and high commissions outside of LOS and don't.
I initially got it to support online air-ticket purchases, annual trips to UK.