I don't like futures for Bitcoin or Ethereum. Because they integrate the current economic system with blockchain. More precisely, they transfer the bad aspects of the current economy to the blockchain economy. Bitcoin is limited. So it is valuable.
NOT like any of us can really do anything about the existence or NON-existence of such products. Right? Good to be aware of these kinds of products to the extent that they might be used to affect, control or manipulate price... or attempted to be used for such.
Actually there is, we can choose to not participate in the dilution of the asset class.
We can also educate those that ask this same question why these unsettled "liquidity supplying, volatility squashing" markets should not be supported but rather the asset itself purchased and held.
Every coin being rolled over in house in these clearing houses is one less actually being bought on chain and that is a direct dilution of the cap.
Think of if no-one had herded to Walmart as was forewarned by so many of us..
If you want institutional money, if you want big traders money for Bitcoin you can't avoid derivatives...
Moreover futures can be very useful for all the miners, they are able to sell at fixed prices several weeks or months before getting their bitcoins.
And don't forget that most of futures exchanges only accept bitcoins. So you need to buy "real" bitcoins before trading on them.