I think it's better to invest it, rather than to gamble it. If invested it, it's clear our balance is safer from lost, and can benefit even little by little, obviously it's safer than gamble it, gambling is more at risk.
I will side with you that investment is safer than gambling because it is less risky If you've researched and know what you're putting your money into. Gambling can also be profitable but very risky that's why I consider investment as the lesser of two evils because you can loose your money in wrong investments too but it takes time and not instant.
You can go big in investing just like you could in gambling; the difference is that with gambling (depending on what kind of gambling you're into) there's more risk of losing meanwhile in investing if you know what you're doing you can lower those risks and your overall chances of "winning"
