Avoid at all costs and, more importantly, learn to spot the signs of these scams, they aren't exactly subtle but newbie FOMO and inexperience means that these scumbags are often able to fool many into parting with their bitcoin to buy or mine-and-hold these useless coins.
I invested so much into SIGT, Look how low it is still, 900 Satoshi? Why didn't you tell me it was a SCAM sooner cryptodevil? The only ones that got richer is the DEV's.