As an IT I understand that passwords in a website are actually encrypted so even the programmers or the websites should not be able to see your password at least.
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This is not always true. It depends entirely on the website you are using and its owner.
The owner/developer is the one who decides how passwords are going to be saved on the database (plain text or encrypted).
As a user and without having access to the website's back end, there is no way to know how passwords are being saved.
Using an exclusive computer linux based to access your cryto related website businesses is a great step.
I encourage everyone to use Linux but it doesn't mean you are going to be 100% safe. A Linux OS can be hacked too and it doesn't matter which OS you are using if you enter your credentials into a phishing website.