BTC, ETH, LTC, TRX, USDT, XRP, ADA.
And what can I say that Trx and Xrp is quite good since so far they are totally more convenient to use compare to the main coins we have here. But in this current condition where market is not stable and have treat for a dump I prefer USDT since it gives us security on volatility side and we can exchange it on the coins we desired after we decide to withdraw it on any destination.
I agree with you and I also like to use LTC since confirmations are fast and the fees are also small. Unfortunately not as convenient as BTC, but if someone is in a hurry then LTC may be good option. I think it's a good coin, it's just a shame that more casinos don't support it.