UNDERSTAND THE WAIT
How Long Does It Take to Mine 1 Bitcoin?
A block reward, not a balance slowly filling up.
There is no fixed time to mine 1 Bitcoin. A solo miner does not gradually fill a balance toward 1 BTC: it finds an accepted Bitcoin block and receives the block reward, or it receives no block reward.
The reward is the block subsidy plus transaction fees. For heights 840,000–1,049,999, the subsidy is 3.125 BTC; it halves every 210,000 blocks. The current subsidy is calculated from the latest available height below. A solo pool may deduct its own fee.
Conventional payout pools can credit smaller amounts over time under their payout rules. That is different from waiting for your own solo block.