However, if Scotland does vote for independence, it might not make that big a dent to Britain's super-wealthy. Britain has a combined net worth of $1.38 trillion, with London's wealthiest accounting for $905 billion of that figure, data from ultra-high net worth data firm Wealth-X shows.
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"If Scotland does become independent, then the UK's ultra-wealthy population will fall 5 percent, a number easily absorbed by the rest of the UK given the strong financial markets we have seen in the last year," said Mike Byrne, Wealth-X's managing director for Europe.
"The regional breakdown of the UK's UHNW wealth highlights how important London has become to the world's UHNW population, not just the UK's."