I learned from him that we shouldn't keep connected any Dapps for a long time. It would drain wallet funds after a certain period. Always disconnect your wallet even if you connect for any reason. Don't just leave it as it is. Hackers have powerful tools to trace you and drain your wallet. Don't give that chance.
Disconnect only is not enough for your wallet safety because third party platform have been connected in your wallet need to revoke to cut with all connecting before, usually I don't use main wallet connecting with new airdrop project or some spent all my fund to main wallet don't use for connecting with 3rd party platform. Last time I connected with new 3rd party site and have domain xyz seem not trusted, but give worth reward trough old wallet used active on trade several dapp exchange, after claiming reward revoke with this connecting and later disconnect in metamask setting site.