So my better option still convert my money into gold or other well known investment that have been legalized by goverment
Gold can be quickly made illegal
If things start to go massively awry for the government (as it had already happened in the past). Whether this will have any effect or impact is another question though. If you are looking to preserve your wealth, gold may well be the best option currently available (at least, regarding passive investments), but you should have this wealth in the first place. If you are only going to build it, gold is not the investment you should be looking into since the profits it offers are marginal at best and on par with dollar inflation over long terms
I don't think that I will ignore gold if a massive financial crash happens. I would be more interested in preserving my wealth, rather than aiming for profits. Gold is the most suitable asset for this purpose. The other assets such as fiat currency, equities, treasury bonds.etc can become worthless if the economy crashes.