Black markets and scarcity have happened every single time governments established maximum prices. It's called communism and they keep doing it because is very convenient for the ruling class. A read for a detailed insight: "Forty Centuries of Wage and Price Controls: How Not to Fight Inflation", 1979, by Robert Schuettinger and Eamonn Butler.

Fiat currencies are money whose liquidity is driven by central banks' money printers. As liquidity increases, banks and elite asset holders' purchasing power go up, while currency holders purchasing power go down. Bitcoin is money whose liquidity is driven by adoption. As liquidity increases, banks and elite asset holders' purchasing power go down, while bitcoin holders purchasing power go up. We are not the same. Boost bitcoin adoption. Accept bitcoin for your goods and services.

initiatives already up. This is a fundraising for bitcoiners: https://pagos.dinerosinreglas.com/apps/3nQLRzkUUzECHi4ersZ33muRvJs/crowdfund It is organised by venezuelan t.me/pakovm from @Bitcoin_Tuesday_Madrid community. Zap up!

Monteriggioni is a tourist driven venue. Usually not really very interesting, you were lucky to hit the fest dates. Nonetheless, being already there, I'd suggest to have one meal at Antico Borgo Poggiarello, an old tuscan house located deep into the valley, today restaurant and lodge. They offer a delicious home made pasta and brew their own limoncello.