Cryptocurrencies marketcaps combined are now around 330 Billion USD, which is roughly 7.5% of cash in circulation in Euro and Dollars combined (around 2500 Bn USD)

Dollar cash in circulation was 1154 Bn USD in 2016:
https://www.federalreserve.gov/paymentsystems/coin_currcircvalue.htm

Euro cash circulation was 1143 Bn EUR in September 2017:
https://www.ecb.europa.eu/stats/policy_and_exchange_rates/banknotes+coins/circulation/html/index.en.html

Clearly, cryptocurrencies usage, apart from pure speculation, is way less than 13% of cash. Isn't it the sign that we are in a giant bubble?