BNB and ETH are definitely solid choices, as they are both well established and have large followings. Because for the last 2 years I have invested in these two cryptos. Even though I took a short investment, at least I've tried these two cryptos.

As for the RNDR and ARB, I haven't tried them yet. I think they are a bit more niche and may not have the same mainstream adoption rates as BNB and ETH. However, I recommend keeping an eye on them as they have some interesting use cases. Especially now that the arbitrum chain is currently attracting many investors.