What is the 50 PokeCoin limit?

Excuse me, could you please clarify for me what exactly is meant by the 50 PokeCoin limit? Is this a daily, weekly, or monthly restriction on the number of PokeCoins that can be earned or spent within the system? Are there any specific conditions or requirements that must be met in order to reach or exceed this limit? Additionally, are there any penalties or consequences for attempting to bypass this limit, and how is it enforced within the platform? I'm keen to understand the full implications of this limit and how it affects users' experience with PokeCoins.