Bitcoin Gold is a Bitcoin hard fork that uses the proof-of-work (PoW) consensus process. However, unlike the Bitcoin blockchain, one of BTG's key aims was to modernize the mining process by introducing the Equihash PoW, which favors GPUs for mining.
While Bitcoin is mostly mined with application-specific integrated circuits (ASICs), this version of Equihash requires more RAM than an ASIC can provide yet operates on a wide range of graphics cards. Unlike the Ethereum blockchain, which uses the proof-of-stake (PoS) method to benefit stakeholders, Bitcoin Gold prioritizes miners' processing power. So, with all the novelties that BTG brings to the table, it seems a real and safe cryptocurrency to invest in.