Taking that first one and looking at current graphs, it looks like we're talking volumes of less than 500 BTC/week for the last year or so: https://coin.dance/volume/localbitcoins/VES/BTC

If we call it a rough average of $10k per BTC, that's $5m/week, or $250m/year. That sounds like a lot, but it's still only ~0.1% of GDP. In contrast, if we look at M-Pesa in Kenya, they report for 2017 doing $62.6 billion in transaction volume, or about 80% of GDP.

So it's not clear to me that Bitcoin is a major player even in Venezuela.