"Careful" means to be cautious, paying close attention and being thoughtful in order to avoid mistakes, accidents, or causing harm. It involves being mindful and taking precautions to ensure safety or prevent problems from arising. Full definition
We are also very careful not to include scam exchanges on our site. (captainaltcoin.com)
This isn't an overly complicated process, but if you aren't careful with what you're doing, there's always the chance you could accidentally brick your phone. (androidcentral.com)
I am not suggesting that the idea that the investor who has accumulated more does not need to be more careful about not losing it. (early-retirement-planning-insights.com)