No. Never upload wallets to the cloud. That's a horrible idea.
Why? If you have encrypted wallet with good password, cloud service provider will never access your bitcoins.
However, if you keep wallet on your PC HDD/SSD or other media, you can lose your bitcoins forever if some force majeure event occurs (fire, floods, explosion, police raid where your PC seized etc).
Encryption is not that rarely broken and cloud services have a lot of computing power. Although risk isn't super high. it is still not negligible in my opinion.
Encryption of wallets is crucial, but their secrecy is still a very good addition to security.