Any ideas on how to spot a bitcoin scam?
It is EASY to spot a scam.
1. It is too good to be freaking true.
2. If it gets a huge amount of money from you and promises to DOUBLE or TRIPLE the amount in an 'X' time, which in this case is a very short time.
There is no easy money in bitcoin, unless it is a field of gambling. Everything has a risks and takes time and effort to earn. Free moneys are just for airdrops nowadays.