Will I reach 5’8”?

I am taller than "average", so you might think "Yeah. It's easy for you to say that. You're tall." It doesn't matter to anyone but you. And I say that as a tall person. I see shorter men (and even "short" men) as just as much of a man as I am. But to answer your question, of course no one knows, but at 17 years I would guess you still have several years of growth.

I agree, and would not give any credit to whatever 'height supplement' the young man is using

It depends I've known some 17 year olds who shot right up over the next couple of years while others pretty much stopped at 15. People are different, all you can do is get enough sleep and eat right.

And, as has already been noted, don't waste any money on snakeoil growth supplements. They won't make you taller, they'll only make you poorer.

You for sure don't want to be injecting HGH. But if you look on ebay you'll find products which stimulate your own body's production of HGH. Some of those probably work.

You will be whatever height you are meant to be. Don't waste your time thinking or worrying about it. I am 5ft.5 and am good with this . It's shorter than the average, and shorter than my father was (he was 5ft.8). I also have relatives (mother's side over 6ft. In height - my grandmother's brother was 6ft7). Height is just a a numerical. Take what's inside you and run with that.

Yeah i stopped buying them

When I searched stuff up on google, they all say I am going to stop at 16 or 17. wtf??

One online source said to let a cellphone battery get low and charge it all the way. Another source said not to let it get very low and to not charge it all the way, so...
Really, that is the first time I have ever heard that people stop growing at 16 or 17. The important thing is that you stand.

Doubtful. The chances of growing and inch and a half after 17 are slim. You best chance would be heeled shoes or lifts in them.

or

You can be you and be happy you are alive and healthy.

Good, spend your money on something you'll enjoy.