I think I read 1200 companies in the blockchain space.
There's going to be some fall out.
This https://worldcryptocon.com/ will have 5500 attending.
All below are in Vegas. 12 or 13 in October alone.
There are conf. worldwide.

World Crypto Conference 2019 - Las Vegas
Tue, Oct 29 – Thu, Oct 31
The Cosmopolitan of Las Vegas, 3708 S Las Vegas Blvd
Las Vegas, NV

8
DEC
ELEV8CON - Blockchain & Digital Asset Conference ...
Sun, Dec 8 – Wed, Dec 11
The INDUSTRIAL Event Space, 2330 Industrial Rd
Las Vegas, NV

29
OCT
WCC 2019 LAS VEGAS — BlockChain Beach
Tue, Oct 29 – Wed, Oct 30
The Cosmopolitan of Las Vegas, 3708 S Las Vegas Blvd
Las Vegas, NV

25
OCT
Vegas Blockchain Week
Fri, Oct 25 – Thu, Oct 31
3708 S Las Vegas Blvd
Las Vegas, NV

26
OCT
CoinAgenda Global
Sat, Oct 26 – Mon, Oct 28
The Cosmopolitan of Las Vegas, 3708 S Las Vegas Blvd
Las Vegas, NV

28
OCT
Litecoin Summit 2019
Mon, Oct 28 – Tue, Oct 29
The Cosmopolitan of Las Vegas, 3708 S Las Vegas Blvd
Las Vegas, NV

27
OCT
North American BitShares Conference
Sun, Oct 27 – Mon, Oct 28
The Cosmopolitan of Las Vegas, 3708 S Las Vegas Blvd
Las Vegas, NV

22
OCT
CoinAgenda Bitcoin And Digital Currency Investors...
Tue, Oct 22 – Thu, Oct 24
Mandalay Bay Convention Center, 3950 S Las Vegas Blvd
Las Vegas, NV

26
OCT
HLTH-2019
Sat, Oct 26 – Wed, Oct 30
MGM Grand, 3799 S Las Vegas Blvd
Las Vegas, NV

29
OCT
World Crypto Conference — The Crypto Explorer
Tue, Oct 29 – Thu, Oct 31
Las Vegas
Las Vegas, NV

17
SEP
Blockchain Development Training in Las Vegas, NV...
Tomorrow, 6:30 – 8:30 PM
Las Vegas
Las Vegas, NV

26
OCT
CoinAgenda Global
Sat, Oct 26 – Mon, Oct 28
5757 Wayne Newton Blvd
Las Vegas, NV

28
OCT
Litecoin Summit 2019 Discount Tickets — Crypto...
Mon, Oct 28 – Tue, Oct 29
The Cosmopolitan of Las Vegas, 3708 S Las Vegas Blvd
Las Vegas, NV

18
OCT
LiteCoin Summit 2019 — BlockChain Beach
Fri, 9 AM – 5 PM
3708 S Las Vegas Blvd
Las Vegas, NV

10
DEC
CryptoBlockCon Las Vegas
Tue, Dec 10 – Wed, Dec 11
5757 Wayne Newton Blvd
Las Vegas, NV