Although Wasabi Wallet is on your computer, the risks of losing funds by getting hacked are very low, unless you are specifically targeted by a highly skilled attacker. The most common causes of people losing their bitcoin are the following:
Someone finds your backup and password.
This is even easier if you store them together. This person is often someone in your close surroundings.
You leave your computer open and someone has access to your password.
You forget your password.
Your computer stops working or you lose it and you are missing either your backup or your password.
You brag about your holdings and someone attempts to take them from you through coercive means.