My Crypto Event - Who should be there?

Hi,

I'm starting to plan a massive crypto event for early 2018 in the UK.

Who do you think should be there as a speaker or contributor?

What would make an event so compelling you just had to be there?

I have a ton of really cool ideas for what to include (workshops and interactive areas) along with speakers but would love to hear your views.

I'm thinking it would be great to have an element focused purely on promoting Steemit and maybe getting some unfluential Steemians to contribute videos about Steem. Who is on your list of people that others must listen to?

Thanks
Andy