Trying to make small investments–is what I’m able to invest worth it?

I'm not someone who has a lot of money to invest in any crypto, and I'm relatively new to mining. My rig on KawPow is only 50mh/s, so I'm a very small player in this field. However, I like this coin a lot. I think it shows a lot of promise, and this is something I'm planning on sticking in and mining for another 5-10 years. I see RVN as a stable long-term investment that may pay out very, very well far into the future. (Hoping to maybe be able to buy a house/put a decent down payment on one by capitalizing on idle time when I'm not at my computer.)

I'm not a very rich guy, but I was thinking of putting in about $50 every month into buying RVN, at least until the halving happens. I know there is a lot of speculation about the halving coming up and what it might do, and I got in a little late on the mining end (could only mine about 6000 RVN from now until then, including what I've gotten in the last month), so I'm trying to get my numbers up a little bit before things become harder to mine on my weaker rig. However, I'm not even sure if $50 is really worth it to invest in the first place. Is it only worth it to invest higher amounts of money this close to the halving? And how should I even go about investing that $50 to get as much RVN as possible with things like exchange fees?

I like the coin a lot, and though I don't understand it fully, I for some reason see the most long-term potential in it. I'm trying to set a good foundation, and any help would be great.

Thanks so much.