Investment can be never considered as addiction as investment requires you to be financially stable to that extent so that you can use your extra money in any profitable venture and in today's time where poverty is increasing with everyday increasing inflation people are having hard time in meeting both ends meet .
They can hardly manage their monthly expenses within their pays so investment is for rich only .
You could consider anything to addiction if you couldn't stop yourself or limit yourself by doing such certain things. For example in gambling addiction, despite losing a lot of money still you're trying to have a loan just to have the funds for gambling which can be consider in investment. Investment still has the risk especially when it comes to crypto industry where volatility is present to it's currency. Greed and addiction to have a stable financial status from investing could still be consider addiction, to point where you forgotten to enjoy yourself as you focus on making money sources.