Managing wealth is primarily about asset allocation. The basis for choice of assets and the proportion that should be held in each investor's portfolio depends on his/her objectives and constraints. It is the core proposition of financial planning.
Children need to learn how these choices are made. In a household that has limited income, running a tight budget might be the only way to allocate money.
Investments are made at different times, and perhaps, through different advisors, which does not help in consolidation.
Investors now want to learn the tricks of the trade and are not driven only by greed
It is not necessary to crowd a portfolio with stocks and funds to give it an edge.
The availability of computing prowess at low costs and the penetration of Internet trading have moved quant investing from the realms of professional managers to retail investors.
Long- and short-term investing require separate strategies that don't mix easily.