Icons:

Bitcoin and the Blockchain; created by Symbolon from Noun Project

The ecosystem; crated by Symbolon from Noun Project

Is it money? Currency?; created by Sergey Demushkin from Noun Project

The bigger picture; created by creative outlet from Noun Project

Cryptocurrencies and innovations; created by Krisztián Mátyás from Noun Project

Beyond cryptocurrencies; created by Maria Kislitsina from Noun Project