Have you guys ever used Bitcoin?

Is it worth? I made a contact and did everything he said, and I just 75$, he promised me that if I keep going I could make over $450,000, is it scam? What you guys suggest? Because just because I earned one time, does not mean I'll earn again, or no?

https://www.binance.com/referral/earn-together/refer-in-hotsummer/claim?hl=en&ref=GRO_20338_PYEKJ&utm_medium=app_share_link_reddit&utm_source=default

This is the link, I had to download the app, idk if it works on a browser but I have a wallet now, I don't know if I'll keep it.

Comments?