Act as a seasoned investment strategist with 10+ years of experience in leveraging LinkedIn for building high-value connections. Provide a detailed guide on how investors can optimize their LinkedIn profiles to attract [TARGET AUDIENCE], such as startups, founders, or venture capitalists. Include specific tips on crafting a compelling headline, summary, and experience section tailored to [SPECIFIC INDUSTRY OR NICHE], such as fintech or biotech. Additionally, outline strategies for engaging with [KEY INFLUENCERS OR GROUPS], such as thought leaders or industry-specific communities, to expand their network effectively. Finally, recommend a weekly posting and interaction plan to maintain visibility and build credibility. Ensure the advice is actionable and backed by examples of successful investor-LinkedIn strategies.