"instantaneous" => it is faster for me to send a payment via venmo, than waiting 24h on a congested bitcoin network. "currency" => I thought Bitcoin at this point is done as a currency. Merchants have dropped it, payment processors (Stripe) have let it go. The next best use case is "store of value", but even there, with a volatility of +/- 50% in 60 days, I doubt that.