This represents about £1000 - 25, 1g gold bars.
Supplied in a sheet, they can be broken off individually (still wrapped) so about £40 each.
1oz about £20 each.
Need less that £20 ? - there is always bitcoin or other electronic crypto-currency.
Worried about forgery? No need to try to bend it with your teeth, there are hand held units for checking now...
Sell them as silver/gold for government currency? What would you want to do that for? Exchanging between crypto-currency and precious metals keeps your money away from the government... as it should be.
But what happens (say) down the pub when you get a round of drinks in?... Well just ran a tab and pay at the end, or go Japanese style izakaya - fixed price for a fixed time, drinks and/or food included. There are solutions to everything.
Why use a gold (or other) backed currency when you can use the raw material directly?
Gold and Silver coins - it's time for a comeback...