Money is not hundred percent safe in cryptocurrency because of the hackers in cryptos world. This has been the major issues facing the platform, so it's not really safe putting money in crypto.
Of course there is nothing 100% safe, everything has a possibility to be hacked, even in your bank account you have the risk of being stolen, but that possibility can be suppressed if you use additional security such as 2fa or store it in a secure wallet like a desktop wallet or hardware wallet and don't forget the risk of fluctuations too
I agree, there is no 100% nothing bad will happen. Disasters happen, natural or man-made, hackers happen, people get mugged or robbed. We can investigate the best methods of protecting our assets and use them.