Inflation is too high, which stops new people from joining. A solution is to have a fixed supply and use a certain percentage of what's left as inflation. The total maximum supply could be 2.1 billion, which is related to Bitcoin. If we have 1.4 billion tokens now, that means we have 700 million left to use as rewards. A good number for inflation could be 10% of what's left. So, in the first year, the staking rewards distributed will be 70 million (10% of what's left). In the next year, only 63 million will be distributed because only 630 million will be left. This way, we never run out of tokens, and the amount distributed always gets less. This might make Polkadot more appealing to people.