Investing 7k USD can be a good start for long term wealth accumulation. With proper research and planning, 7k can be invested across various assets like stocks, bonds, real estate etc to build a diversified portfolio. This article provides insights on various investment options for 7k capital.

Invest in index funds and blue chip stocks
A good way to invest 7k is through equity index funds and established blue chip stocks. Index funds provide broad market exposure at low cost while blue chips offer stability. An allocation of 4k into index funds tracking S&P 500 and Russell 2000, and 3k into stocks like Apple, Microsoft can build the equity component of portfolio.
Add some bonds for stability and income
Bonds can provide stability and regular income for balance. 2k can be allocated to bond index funds and 1k to selective corporate bonds from financially strong companies. This allows participating in upside while buffers against volatility from equities.
Consider alternative investments in small amounts
7k also permits allocating small amounts to alternative investments like gold, real estate and peer-to-peer lending platforms for further diversification. 500 USD each can be invested across alternatives which may perform well during equity downturns.
Dollar cost average and rebalance periodically
Rather than lumpsum investment, stagger 7k across 6-12 months through dollar cost averaging to avoid timing risk. Periodic rebalancing, like annually, to original allocation helps maintain portfolio stability and optimize returns.
In summary, 7k USD allows building a starter investment portfolio using instruments like index funds, stocks, bonds and adding small allocations to alternatives for healthy diversification. Dollar cost averaging into this portfolio, holding long term and rebalancing periodically can generate good risk adjusted returns.