1. Bitcoin
2. Ethereum
3. Bitcoin Cash.
4. Litecoin
For what reason did PayPal include Bitcoin Cash, if they have already entered Bitcoin it's better not to have to put in dead fork coins. Maybe Ethereum will cost money but after Ethereum 0.2 it will be a bit different. But I tend if PayPal just BTC, ETH, and LITECOIN is a good alternative, or maybe BNB and Stablecoin for more variety.
Bitcoin cash is not dead yet, also this project can make a big comeback in future who knows? I have use Bitcoin cash to make a payment few times before and I kinda like it better than Bitcoin.