never!
this is how bitcoin is supposed to work. the block rewards that miners gain is reduced by 50% every 210,000 blocks (halving) or approximately 4 years. this is done in order to have a limit for the number of bitcoins that will be created (limit it to 21 million max)
it was 50
BTC per block at first and after the first 210,000 blocks it became 25
BTC and now that we are at 426,606 block the reward is 12.5 and will be 6.25
BTC @630,000 block and so on
https://en.bitcoin.it/wiki/Controlled_supply