Only 2 days? I've had mons get spider webs on them for sitting 5 days in gyms until some people finally kicked them out. Niantic made gym attacking pretty much pointless because instead of stopping the opponent from getting more coins, you're actually helping them if you send them home. If the opponent could continue to gather 50 coins daily and claim them at a certain hour, that would be more of an incentive to stop them from collecting all 50 coins.
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Why I Hate The New Coin System
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There is something you should keep in mind: 99.6% of players were not able to colect more than 20 or 30 coins per day, so they are actually collecting more coins now than ever before.
I was used to collect 40-50 coins per day, so the new cap doesn't hurt me. On the other hand, my wife has doubled her incomes. So I miss the dust, not the coins.