A few things that may explain the Monero stats:
1.) Monero is still entirely mined by CPU/GPU
2.) Monero hardforks every six months to make sure that 1.) remains true, so a lot of people may be putting transactions on hold since the next fork is scheduled for March, especially because
3.) the "rival" fork, MoneroV, will compromise Monero's ring signatures during and immediately after the fork by invalidating some decoy transactions (among other things)
4.) Monero is not widely accepted by merchants, possibly over concerns about taxes and money laundering
5.) Buying and storing Monero is difficult for the average person due to the total lack of hardware wallet support and dearth of trusted web wallet apps. Plus, if anyone has tried syncing the Monero blockchain locally with the GUI or CLI desktop wallet, you can see why some the average person would run out of patience...