If you said duck fiat and bought hive on the 26th or 27th of April you could be down 70 or 80%. What you might lose in a year holding a third world fiat currency you could lose in a short few months with crypto. I believe in hive but it isn't a store of value at least not yet. So if you need value buy a basket of stable coins and hold some fiat in USD, Euro , GBP etc if possible.
Is it safe to not report crypto gains, income on your taxes?
It is and it isn't. In theory if you blog as a real person like John Smith on hive and Twitter then you are auditable if the government tried which at some point they will. Or someone doesn't like someone and reports them to the tax authorities lol.
Or if you run money through the liquid kyc exchanges then they could at some point be forced to export their transactions and give them to a government. In practice there are too many cryptos for tax authorities to keep on top of so unless you are a public figure with obvious income you probably won't be caught. This obviously isn't tax advice though. Always declare all taxable incomes and gains...