In the context of behavioral finance, particularly focusing on Behavioral Portfolio Theory, a financial advisor is analyzing the investment preferences of a client, Mark, who has a varied set of goals ranging from short-term liquidity needs to long-term wealth growth. Mark expresses a strong desire to secure his children's education fund while also considering his own retirement plans. He feels uneasy about stocks due to recent market volatility but is attracted to the idea of investing in high-growth startups.

Considering Mark's emotional biases and how they might impact his investment decisions, which of the following behavioral portfolio positions would Mark most likely adopt as advised under Behavioral Portfolio Theory?