Just a small calculation for the cost of an attack on some POW cryptocurrencies - http://bitcoinist.com/cost-51-attack-major-cryptocurrencies/ Note, there is an attack score for Bitcoin Gold. It is worth thinking carefully before investing big money in such systems.
Thank you for the interesting article! I also think that investing in crypto currency in general, and bitcoin gold in particular, is a fairly risky business. So do not invest the last money and diversify your assets