You are required to provide the best investment for your client, Jacob . He is 35 years old single man and works in an accounting firm as an auditor. He plans to marry with his girlfriend in three years. His gross annual salary is 37,000 and subject to 20% income tax bracket. He adopts saving before spending approach to control his regular expenditures. Therefore, he can save 20% of his salary after tax and plans to invest his entire saving of 160,000, which was mainly earned by investing Bitcoin and Ethereum a year ago, in a diversified portfolio. He wants to buy a two-bedroom apartment in Hertfordshire with existing market price of 400,000 for marriage. Jacob has invested in stock market since studying university. Besides, he makes his own decision on the pension plan offered by employers. At the beginning of 2022, Jacob sold all investment holdings due to unforeseeable magnitude of monetary policy tightening launched by the Bank of England. Now he expects the interest rate will be peaked soon and he is going to construct investment portfolio for his future.

Question: Describe and explain the risk tolerance level of Jacob.