Polkadot because Polkadot has a very super good value so it is very good to be invested in the long term, this system from Polkadot carries the same thing as the current trending topic, namely Ethereum Virtual Machine (EVM).
But Polkadot also has a special network for its own blockchain and is able to send Polkadot coins up to 150,000 coins in 1 second, that's a lot of value and this, when combined with arbitration, makes Polkadot very worthy of profit.