I have 2 questions about Waves leasing:
1. Is it risky?
2. Can I choose a random address (for example, the one of a friend of mine) as "receiver address" or I earn interests only if I choose an address which run a node? In short, in order to earn interests, can I put any address or just the ones who run nodes?
1. Don't think it's risky to lease as long you are holding your seed code secure, better to make a few back-ups and don't store them on your pc.
2. You can only lease your waves out to an Node.
Here you have a link to all the Lpos full nodes: https://gravit.ws/lposlist.aspx
Do some investigation to which node you lease because with some nodes you receive additional rewards in tokens which have also value.