its still recommended to buy now before it goes $1 and up after all WAVES is sure to go up once those DAR and INCENT are going to go live and waves fullnodes are up. the only question though is when. but still $0.40 is a good price to start still. Buying can be profitable for investors but that is if there are dumpers still.
Waves and other coins like it will never have a high number of users because of the poor distribution aka no PoW element. However the advantages of just having a set total coins is there is no price pressure, big holders have all the power and can starve the market forcing buyers to pay a premium for the coins. It's a good concept that NEM also used.
Short term it's a great buy but long term it will never truly shine. Lots of other coins will be created with this 100% premined concept and they will flood the market.