according to the calculations of blocks and checking with other data, the approximate total number of coins 300000 unit can reach 45-50 bill coins, but after 300k block is the number, i.e. its gain will decrease to the reward of 30,000 coins per block, i.e. the total number of coins in 5-7 years can reach about 55-60 bill coins, let me remind you that this data is not accurate
In Sia FAQ - "The number of siacoins created each block is (300,000 - height). The genesis block has a height of 0. After height 270,000, all blocks will have a reward of 30,000 siacoins. The current number of siacoins can be found at explore.siacoin.com"
Right now the Sia block height is 43,049. So it will need about another 4.3 years((270,000-43,049)/(144*365)=4.3years) to hit the 270,000 block height to start the 30,000 coins constant rewards. in about 4.3 years when sia hits the 270,000 block height, there will be about 44.55 billions (((300,000+30,000)/2)*270,000=44.55 billiobs) siacoins available in the market. From there, there will be about 1.57 billions (30,000*144*365=1.5678 billons) of siacoins coming out from the mining every year constantly. So in 5 years from today, there will be about 45.6 billions of siacoins available. In 10 years from today, there will be about 53.5 billions of siacoins available in the market.
