First of all, you should see what kind of income you want to achieve with this idle money, because what kind of risks correspond to what kind of income, and you must have the ability to bear high risks if you want to obtain high income.

If you can't take risks, it is recommended to choose bank time deposits. Under normal circumstances, it is also a very good choice to deposit money in the bank, but the premise is that during this time, the money is always in a state of idle money. If you need to use it halfway, it will be more troublesome and the income will be much lower. So, if you have 300,000 cash in hand and can't take risks, you can choose bank time deposit, which can guarantee our income, and

If the risk tolerance may be low, but this spare money is not necessarily suitable for time deposits, you can choose some better money funds. Under normal circumstances, the risk of money funds is extremely low, and low risk corresponds to low returns, so we should also accept the low returns brought by such funds. Under normal circumstances, the annualized income of the money fund is below 4%. However, it should be noted that the fund can avoid risks as much as possible and create income. When we need this money, we just need to redeem a certain share of the money fund. In a sense, it is more convenient than bank time deposit.

If you can accept a little higher risk, you can also try to get some higher returns. Under normal circumstances, you can choose bond funds or even bond partial stock funds. Although this fund has great fluctuations, the risk of this fund is much lower than that of the stock fund, but its historical income is much higher than that of the money fund.

If you can accept greater risks, you can earn some high returns, buy some stock funds, and choose active funds or index funds, which are all good choices. But when choosing this kind of fund, you must choose a good fund manager to ensure that your income is as stable as possible.

In addition to the above, some wealth management products of banks are also good choices, but it is best to ask about the risks and benefits of such wealth management products before buying, and to clarify the degree of freedom of such wealth management products and whether they can be redeemed freely when using money.

So, if you have 300,000 spare money to invest, it depends on your own risk tolerance. The financial products suggested by different risk tolerance are different. If you don't have great risk tolerance, try to choose bank regular financial management and money fund.