Bet on size of price movement instead of direction
A MOVE is comprised of a pair of put and call options where both these options have the same strike price. Value of a call option goes up when price of the underlying goes up. Conversely, the value of a put option goes up when price of the underlying goes down. Since a MOVE contract has both a call and a put option, its price is independent of direction of price movement. MOVE contracts are a play on volatility of the underlying (bitcoin or ether currently).
Both MOVE and futures are derivative contracts. Both enable traders to take leveraged positions on their underlying cryptocurrencies.
Futures are used for directional trading. You go long futures when you expect the price of the underlying to go up. Conversely, you go short futures when you expect the price of the underlying to go down.
MOVE options are used for volatility trading. The price of MOVE options are a function of the movement (i.e. volatility) in the price of the underlying. Direction of movement is not relevant.
You should trade MOVE options when you have a view on the magnitude of movement in BTC or ETH price. If the price movement that you expect is greater than what has been priced into the MOVE contract, you should buy MOVE contracts. Conversely, you should sell MOVE contracts when the movement priced into the contracts is more than your expectation.