Well said Wageslave.
Airlander is from a financial investment viewpoint high risk - but it's not bound to fail, and if it doesn't fail offers significant potential opportunities.
This who don't believe in it, only need to not invest in it. Those who do, can.
I know a number of the engineers working on it, and have had reason to study airship technology over the last 20 years - I don't think it's a dead cert to either succeed or fail, but anybody trying to talk it down is just showing their own mean nature, and those supporting it are supporting possible progress. Best of British to the latter - in every sense of the phrase.
As for all the other things that you could do with the money - those can be done as well, by those who would like to spend their money.
G