Colorado Springs apparently is about to take its place among the ranks of cities becoming home to the complicated and confusing world of bitcoin mining and cryptocurrency. A California-based limited liability company, 3G Venture II, paid $13 million last week for a large portion of the former Intel Corp. chipmaking complex along Garden of the Gods Road on the Springs' northwest side. 3G Venture's owner, identified in public records as John Chen of suburban Los Angeles, couldn't be reached for comment.