Partnering with Rocket Dollar. This is the legal entity for your business. Early investors of Facebook, Yelp, and Linkedin have built up incredibly large retirement accounts. However, self-directed IRAs require you to hire a custodian who can assess alternative investment assets and provide the necessary record-keeping services. A typical investor would maximize his or her after-tax returns by allocating to active public equity strategies and taxable bonds inside an IRA, and real estate, passive public equities, tax-free bonds, and startups with their taxable funds.