Do not be too happy! If you notice, after 150, it will take forever to reach 151. And forever and forever to reach 152 and so on.......
At the rate, that they are rolling out the updates, one would have mastered every "coin worth"crop available and there will be no way to earn more gems . Then you would have to BUY the "gem worth" crop to master. And buy more gems to buy from their periodic sale.
So where will this lead us to?