a lots of things are already been provided i guess much better to keep seeking for the things that you are familiar with or the things that get your interest because while holding your bitcoin its already moving make it to grow more would be your decision in which way you choose, trading ,lending ,gambling those are the most common look if what interest you most mate.
But the options which you mentioned to grow the bitcoins. It all seems to be high risk factor investment pools. Instead of this you can able to try with different option such signature campaign, Skills for rent, start services in bitcoin acceptance in payment and many more.