Bitcoin Gold is one of the few cryptocurrencies that is already developed and doing what it promised.
It is cheaper to send transactions with Bitcoin Gold than it is to send them on the Bitcoin and Bitcoin Cash networks. BTG 0.005 usd vs BCH 0.025 usd. The block size is only 1 MB like Bitcoin, but since they aren’t contesting with centralised mining, they can fork the chain at a later stage to add lightning, side chains and larger block sizes when and if it becomes necessary.
Only time will tell if the team will follow through, but if the network gains popularity and merchants start to accept Bitcoin Gold like they have with Bitcoin then it is a great long term investment. There is already a partnership with Paybear and Coingate. These are both reputable payment processors that give thousands of merchants the option to accept Bitcoin Gold. Cryptocurrency is more developed now. All of the services that were made for Bitcoin can easily add Bitcoin Gold functionality because it is fork. If companies did this then people would go to prison, but cryptocurrencies can and often do make copies of each other and use their parent chain’s brand power to attract million dollar marketcaps. Bitcoin Cash and Ethereum Classic are both great examples.