“A lot of the best tech startups are ideas that have been around for years”

A lot of the best tech startups are ideas that have been around for years but the time is finally right. *

Some people get jaded. “We tried X years ago” and summarily dismiss. But then eventually the time is right and it works. *

Examples include touch computing, virtual reality, and many areas of artificial intelligence. *

Or as pmarca says:

In tech, “I tried that 20 years ago and it didn’t work” is a positive predictor, not a negative predictor

“A standard protocol for machines to negotiate bitcoin payments for resources”

Great idea from Brian Armstrong of Coinbase:

1/ Seems like there should be a standard protocol for machines to negotiate bitcoin payments for resources.

2/ Examples could be getting access to wifi hot spots, your car finding charging stations, mesh networks (net taker/giver).

3/ Devices could be like vending machines, you drop them out somewhere, and they generate rent for providing resources to passing machines.

4/ Sample protocol (a) i need X, anyone have it? (b) I have X for sale at Y (c) I accept, payment embedded (d) I reject, stop pinging me

We are dying to fund people working on ideas like this, or like these or these.