With this one known fact about Bitcoin, my question is what happens after the limit has been reached?
This is an intriguing question that will cause one to assume or imagine it by then. However, the fact remains that no more bitcoin will be mined. The miners' reward for successfully mining a block into the blockchain will end. Bitcoin's price will almost certainly be much higher than it is now, and it will almost certainly be stable by then, with widespread adoption. Although these are all fictitious facts about it, few or none of us will be alive to witness it, but one of these events is very likely to occur.
But if Bitcoin is still around by then, I have no doubt that its value will skyrocket. Miners will always support Bitcoin since they will continue to profit from transaction fees. When the number of Bitcoins reaches 21 million, the price will be very high.
After the 21,000,000 BTC has been reached, where will the miners' charge be deducted from? And how will that actually be of advantage to miners? Pardon my silly questions. I know little to nothing about how mining and its charges work.
After a block is mined into the blockchain for every successful transaction; for a normal wallet the miner earns the reward for it. However, if it is an exchange or custodian wallet service, the higher portion of the fees goes to the exchange and the lower portion to the miners as its shown on the blockchain explorer.