But despite of the stable growth, Ethereum may find 2019 a tough year to begin with. Aside from the less transaction it has compared to the others, its dapp users needs to maintain an ETH for the gass fee every transaction. This greatly affects the dapp users experience and full mass adoption of Ethereum Dapps.
This is something an Ethereum dapp must consider and/or think about this year.
Source: https://www.dapp.com/article/annual-dapp-market-report-2018?utm_content=Vale
Well basically wallet holders are from bounty hunters who are cheating the bounty. There's no doubt the ethereum will going to have a huge market since its volume is infinite and that is already expected.