Am I being lucky?

I started playing online like 5 months ago.I never intended to make living or even earn that much money from playing poker, I just played for fun. I deposited ~50$ and just played some cash games, HU SnGs and w/e I felt like if I lost it all I would deposit 50$ few days later again and play some freerolls meanwhile etc.

Soon I was down about 300-400$. Then I started playing 6man SnGs and started to do well on them. I deposited only 50$ and made it up to 1050$ in one night. I withdrawed all of it and deposited 40$ later and made it to 170$ playing 6man SnGs and withdrawed again. Then I deposited 35$ and made it up to 100$ just with SnGs.

I feel like I'm running very good but I almost always end up being 1-3 in those 6man SnGs. I just follow easy strategy by being TAG whole time and stealing blinds when it's good spot. Normaly people drop very early and we are left with 4man and then I start to play. When there's 3 left I'm usually chipleader or 2nd most chips and I just let them drop one out so im HU and cashed 100%.

I only play 1 table at the same time because then I can focus on everyone and it's easy to beat most of them just by watching how they play first 5-10 hands. I have played twice 200$ SnGs for fun and first time I was 2nd and 2nd time I was 1st and won +550$ from it.

I'm still very young and I have about 2.2k$ if I want to play but I'm not sure should I keep playing SnGs if I'm just running good atm or should I just stop playing poker now.