Plenty. If you do some research and use your common sense though, you will be able to avoid 99% of these scams. Anything that involves you making a lot of money in a short period of time is deserving to be suspicious of.

LTCminer based on some research is just like a classic ponzi.

The trend recently has been lending platforms, and these can be especially tempting to invest in. Just keep in mind that volatility bots do not exist, otherwise bitconnect would be a gold mine that is still operating.

Sites that expose scam sites include badbitcoin.org and scambitcoin.com. If you're really unsure then make a thread on bitcointalk.