I have read that there is a possibility of someone mining on non-segwit version of Bitcoin and receiving bitcoins like these then a few weeks after UASF goes in and gets most of mining power all the btc from non-segwit version are going to get erased.
How do i know that bitcoin i am receiving now won't disappear once segwit goes in?
Actually, when Bitcoin is going down, is when you want to buy bitcoin, especially if you are doing buy low sell high. When Bitcoin dropped to around 2000 USD, a lot of investors started rebuying bitcoin since they released it was so low, and then after so many people rebuying Bitcoin, the prices quickly grew and restabilised itself at 2300 USD. Now Bitcoin is still growing and the price of it is at 2400 USD now.
Unlucky, but you missed your chance to get some cheap bitcoin, now I don't think there will be a price drop that takes Bitcoin below 2000 USD anytime soon.