Why not invest in my vastly superior idea, the inflatable bicycle? Bike will take a minimum of three years to produce, but I'll produce interesting if inaccurate newsletters every month, together with the odd, and slightly out of focus video.

Buy in price is only 2500€, which I will invest in high interest accounts for several years. You won't see the interest, nor the money again, but, at the end, you can bask in the glory of a bicycle technically superior to any other, while I bask in the glory of a martini by the pool in Monaco.

What's not to like?