How can one add/link the price of a coin? I added waves in my portfolio and it's showing 0 price. Can I do it manually or should I ask support to add the coin to their database?

Do you think it is still feasible to invest in Monero for the long run or should I wait for another dip below $300?

I really think SPECTRECOIN (XSPEC) has room to grow.

I think any altcoin that is still growing and gets listed on bigger exchanges by time has growth potential. The challenge is to inform yourself on the roadmap of these small cap coins in order to invest early before many people get to know about them.