Answering this question has been harder than I thought. I hate to say "Don't go to my country right now". But I've to be honest, I don't think it's worth the risk visiting right now due to crime, robbery, murders, kidnaps and more.. Even though a dollar will go a long way, your life is worth a lot more.. Hopefully things will get better soon you will be able to see the Angel Falls and Los Roques with your own eyes!
Not at all. It's too unsafe, and the tourism industry is not good either. If you still want to go, do so with a local. That way you'll reduce risk quite significantly.