so I got my first 40$ worth of bitcoin i noticed that the that the 40$ goes up and down. Im scared that it will go to 0$ is this possible?, Should i spend my bitcoin on a giftcard? any help please

No im not trolling, im shocked that im losing money, so this happens to everyone else?

So I had 59$ of bitcoin in my wallet which is on the website paxful.com...i noticed i went from 59$ to 60 and everyday it would go up in just a couple of cents and now ive noticed its dropping in price (now at 58.94)....Why is this happening should i move the bitcoin to an offline wallet like downloading software based wallet....Could paxful.com be stealing my bitcoin??? Please help

will blockchain take a certain amount off me for using there service

So a guy gave me some bitcoin thru a website called paxful.com i have the bitcoin money on there know i have no idea what to do. i have read stuff about bitcoin wallets, should i get a wallet or is the website paxful.com a wallet?