Your comment is very misleading. An investor never needs to understand the volatility of Bitcoin to invest. Only if a person has basic knowledge about Bitcoin and a source of discretionary income can that person invest.
If you don't understand Bitcoin volatility, even with a source of income and discretionary income, you would still find Bitcoin difficult to invest in. There are people who have income and discretionary income who find it difficult to invest, and those who try to invest when the price of Bitcoin falls may panic and sell at a loss; this is because they lack understanding.
Understanding is the principal thing when it comes to Bitcoin investment. When you have this understanding, you will know what to do with your income and discretionary income. However, when the understanding is not there, you will be confused; even if you try to invest in Bitcoin, you will be uncertain about what to do, especially when the Bitcoin price drops.