Just like you've stated, "it's your little knowledge" as a newbie. Else, the points you've made doesn't mean much in the sense you presented them.
* It gives you choice,
Well, what choice is that. You've always got a choice in all you do. To invest in cryptocurrency or not, to look towards other fields of an investment for an opportunity. To invest wisely or not. You've always got a choice regardless of cryptocurrency.
* It gives you money,
I can say it doesn't give you money. The skill you master, offer and render to someone is what pays you or gives you money. Perhaps your investments too and not necessarily cryptos. Cryptos is just another currency for payments.
* It gives you knowledge of trading.
Well, goodluck with that. We've got several users on the forum and off the forum yet, they've got no clue of trading. You've got to study trading to get these ideas at least. It doesn't matter how basic you limit your studies to.

Let me just hang it there for the advantages.

On disadvantages;
* Time consuming,
In fact, this is the opposite as, transactions could be done across the working seconds or minutes.
* loses are irreversible,
That's in the event that you get scammed or you sent your coin to a wrong address and more of those.
* It discourages seeking other careers,
Really?!!!

I'll end here too. You need a lot more reading at OP. Nice trying!