Bitcoin and other cryptos are going down which means it's a good time to buy. I want to purchase but i'm afraid of all the drama around 1st of August.

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?