Although the current frenzy around funny green frog pictures seems a little artificially stimulated, this is another great stress test to test the Bitcoin network for anti-fragility and a clear demonstration in real time that the network can remain stable even in the distant future, when the reward for the block will tend to zero and the commission will be the only incentive for miners to continue working without relying only on sheer enthusiasm.
The only way you can know what will happen when the block reward goes to 0 is to wait and see.
I'm sure transaction fees right now make up a small percentage of the overall income from mining a block. So it's not like miners could sustain themself from just monkeys.
If you were not so unreasonably self-confident, you could, for example, look into any blockchain explorer that you like and see for yourself that
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