Act as a seasoned patent attorney with 10+ years of experience in intellectual property and investment strategies. Provide a detailed guide on the best ways to invest in patents, covering [TYPES OF PATENTS] (e.g., utility, design), [INVESTMENT VEHICLES] (e.g., funds, direct acquisition), and [RISK MITIGATION TECHNIQUES] (e.g., due diligence, diversification). Explain how to evaluate patent portfolios, identify high-potential technologies, and leverage licensing or litigation for returns. Include real-world examples and cautionary tales to illustrate key points. Tailor advice for [INVESTOR PROFILE] (e.g., individual, institutional) and [BUDGET RANGE] (e.g., $10K, $1M+).