@bryan Using the concept of "Time Locked Address(BIP 65 )", we can create a transaction today. In order for someone to unlock the coins in that transaction, not only do the un-locker need the Private Key, they would also need to wait for that future time(in block height).

Think of this as 2 of 2 multi signature where one key is the Private Key, other is the Block Height. Therefore, we can publish the Private Key openly but no one can spend it until the Block height is reached. This creates an incentive for miners who would do whatever it takes to mine that block when the time comes.