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If you use the delegation tool from steembottracker to delegate some of your SP to @canalcrypto then you'll earn a passive income paid daily (a bit more than 0.1% of the SP you delegated per day - paid in SBD). So that's very very interesting / lucrative ;-) I made a tutorial for that if you'd like: https://steemit.com/crypto/@fabricus/0mkoxsi4

it is very exciting to join..minimal how many sp can we send?
I will promote this to another friend of his

... and of course, needless to say that the SP is still yours and you can get it back whenever you'd like (although you have to wait for a 7 days cooldown period to get it back - steem rules).

@rinaldioce There is no minimum but as you get a percentage based on the SP you delegated the more you can delegate the better (keep some SP to still be able to post, upvote ,etc. don't delegate everything or you'll be out of bandwidth). Some of @canalcrypto delegators are delegating 4 SP and some 100 SP (I'll soon join with 2800 SP to beef it up) so that's up to you man. Either way you'll get at least 0.1% of the SP you delegated daily ;-)