Yep, this could be a big issue. All operating systems have supposedly issued patches to this, but because this is a hardware bug there is a belief that they can't patch this completely. I'm basically a HODLer, so private keys never touch my online computer, but I do a small amount of trading using software wallets. I'm going to be restricting this activity and maybe looking at getting a hardware wallet...something I haven't been inclined to do. I'm not convinced of the security of hardware wallets, either. Face it, crypto is the jungle.