I think your asking the wrong question. Masternodes are not a reason to buy crypto. They are a feature to support (and reward) a function that adds value. This is where coins like Chain Coin fell down.
In software dev we had a saying that (paraphrased) was everyone wants dev that is good, cheap and now. You can only have 2 out of 3.
You can have good, now - dash
You can have cheap, now - chain coin
You can have good, cheap - but not now, you have to be patient and find one that is right.