* London Stock Exchange, Banco Santander, Microsoft involved `: LONDON (Reuters) - Major finance and tech firms are pouring money into startups building technology to develop the crypto market, even though they’re steering clear of the volatile currencies themselves. Venture capital investments in crypto and blockchain startups that included funds from corporates have raced to $850 million so far this year, data compiled by PitchBook for Reuters shows. The 13 deals put the flows on track for a second straight annual record.