When you are incubating new ideas, "Don't put all your eggs in one basket" is very good advice. But when you are seeking to transform your enterprise's portfolio by scaling a fledgling business to material size - say ten percent of total enterprise revenue - then it is imperative that you make that the singular focus of everyone in the enterprise for the two to three year period it is likely to require to reach its tipping point. Expecting to do two such scaling efforts in parallel is simply folly, yet that is what the "eggs/basket" idea is often used to justify.