It’s possible to keep them separate if you use coin control when you spend from that account. I would label the UTXOs so you remember which UTXOs are non-kyc. Unfortunately, not all wallets support coin control. For example, nostr:nprofile1qqs9mvjd9uym8ey4w5vevlrxqfesm666cm6su27svcwqfvj8ztvhlgspzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhgqgkwaehxw309aex2mrp0yhxummnw3ezucnpdejqsg4n4t doesn’t support coin control. I really hope they add coin control soon.