About 76 million people with $18 trillion sit in that range today and another 4 million are joining the group each year, according to a report by the Boston Consulting Group. Competition to serve them is heating up as banks, fintechs, asset managers and online brokers jostle for position. Wealth managers including UBS Group AG, Morgan Stanley, and Bank of America Corp. have focused their expansion on clients with fast-growing fortunes of tens of millions to billions of dollars.

https://www.bloomberg.com/news/articles/2019-06-20/-18-trillion-held-by-poorest-of-the-rich-is-new-bank-battlefront