There are a lot of warning signs about Plexcoin which many people have picked up on. Here is a good article to get you started:
https://steemit.com/cryptocurrency/@enkrypton/plexcoin-the-next-cryptocurrency-confirmed-scam
Overall, if the risk is manageable, then it's ok, of course. But be careful with all these hosts of cryptocurrencies coming out. A lot of them are scams and can be identified early on.