Having an investment manager itself is not a bad idea but it also depends on what you want to invest on,there are some kind of investments that you definitely need an investment manager while there are also some form of investments whIch you can do on your own

If you are investing on stock markets well i believe that you need an investment manager for such an investment and the investment manager should be a stock broker with experience and knowledge about the stock market

But if you are investing on cryptocurrencies then i believe that it is something you can invest on without an investment manager because what will make your investment secure and profitable in the cryptocurrency market is your wealth of knowledge and also experience concerning the market itself and so you can get that without an investment manager

But be aware that if the investment manager is someone that is also an expert in cryptos then you can now use such investment manager for your investment portfolios