I would like to share an idea of future coin development.

Here is my proposal: add a feature to wallet to lock coins for a long period of time. Call it Proof Of Long Hold/Stake for example and offer slightly increased interest rate.

The idea:

1. User send special amount of coins to special address in his wallet.
2. After a months he will receive his special amount + extended reward.
3. Coins unspendable during this period.

Just like proof of burn, but coins always back after a long period of time + reward.

Or just a special kind of staking when coins locked for a long period (2 weeks or 1 month). So coins are unspendable and can not be dumped hard. Such blocks can require 10K confirmations for example to make sure that coins are unspendable.

Dev, do you like it?

Update: How to determine what address is suitable for such kind of stake? Just send a special amount, 1,999,999 coins for example, than wallet will stake it immediately. To avoid possible attacks, such addresses must be filled with special amount in a single transaction. Pretty simple to implement.