Total Bitcoin newbie here. I have no bitc, nor a wallet, nor am I sure I want one. I've been intrigued for a while, but security is a big passion of mine...
Today just now youtube pointed me to an interesting lecture by Bill Gates and others.  Apparently it was at the SF, CA exploratorium in the 'morning', but that would not fit with the current timezone if it is live. (That part just came up at the end of the Bill Gates section a few minutes ago.)
This video is supposedly by Microsoft Europe - but the author has only this video.
There was a big picture on the screen while Mr. Gates was speaking at the "Village Global" event. It advertised free bitcoin if you send in bitcoin, eg they will send you back 10x what you send in from 0.1 to 20 Bitcoins.
The address per "Microsoft admin" in chat is: 1w1AQvpK4ixo9YQ3KHFYi4BgKHuDqg1hR
Online I looked that up  and found this:
Total Sent 0.00000000 BTC
I believe that indicates the ad is definitely a scam. Did I get it right???
Are there other ways to check for scammers that I may not know? Thank you so much!
 Bill Gates about Microsoft Future, Quantum Power, Bitcoin Evolution - YouTube: https://www.youtube.com/watch?v=oKzuP-Pljpw
 Blockchain Explorer - Search the Blockchain | BTC | ETH | BCH: https://www.blockchain.com/btc/address/1w1AQvpK4ixo9YQ3KHFYi4BgKHuDqg1hR