how long does it usually take to recover 2% dilution fee?
There cannot be any fixed timeframe for getting you 2% profits. I read dogecoin investments are yielding little to negative profits whereas if you invest litcoins then you may earn comparatively decent profits. But in general, in long run houses win, so if you keep your nerves down then better chances to be into green. Patience pays 
.Yes, investors are sore losers just like gamblers as well some times. Which means if you are patient and you have a thick skin, there could be days someone wins 200+ bitcoins and maybe it will happen few times back to back as well? It is all a possibility since we are all doing something based on luck. All of this is not that easy but if you can wait it is a great thing over long term obviously.