Hello recently i'v seen that i am using a lot of different blockchain so this is my "top of the four most used one" and with some more information like why i use them or things like that
Hive, Hive is the blockchain i use the most : posting, reading, curating and much more like laugh with the tags #meme or enjoy the best photography with the #photo there is a lot to see and to do here, I use hive as a "bank" too, what i mean by that is that i pass a bit of each day to watch my hive, hbd, Hivepower, hive-engine token. SO yea hive is the main blockchain used.
Wax, i use wax way less than hive but it's still the place where i have a lot of my NFTS for p2e or just art nfts. Pretty usefull to trade/send/make nft, but not really to hold and gestionate my funds
(Some p2e i hold nft of : ALienworlds, warsaken, other)Polygon/BNB, i use both for almost the same reason ; try to claim some shitty airdrop, get some nfts, stake a lot of shitcoin at high apr while i believe at least one of those will sky rocket one day. And for some "normal" stacking too (like pancake swap)
Vite, vite is a nice blockchain i believe. I don't really "use" this blockchain i mean i just hold some token and do nothing with them on this blockchain except vote for a validator to get some voting rewards of vite token
Being "Online" on a lot of blockchain can be cool because it reduce a lot of risk, one of your keys get leaked ? it's okay you have 10 other blockchain. One blockchain colapse ? It's okay the other blockchain are still alive. One of the blockchain token loose all it's value ? It's okay you hold 10 other.
But you need to stay careful because the more blockchain you create accounts the more chance to loose a key, to get hacked, to get your password hacked (if you use same password on all website)

So i would say just do as you want be measure the risk / advantage before to get a wallet on all the blockchain you find, have an amazing day on hive
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