I like velox platform as their exchanger with no identity, no limits, no verification such it's more secured for the investors to invest

may be velox use different Fiat currencies which may be easy to cash in anger cash out. But I recommend a 2FA authorized at least for velox launch.
Well so far their platform is safe and apperently they didn't have any complaints or problems when it comes to security . using 2FA will only add more time waste in the login in process and you would need to have your phone with you most of the time.
2FA is a must have for any exchange, not having it means either devs made (or making) a big mistake out of ignorance or you're likely to be screwed.
Your phone far way approachable than your PC, so don't you say it's a problem.