Investing your money into altcoins, like bitcoin, needs monitoring because if you didn't know that the value of altcoins become so low, it will be a huge loss for you. For example your altcoin is worth $1,000,000 but when the value of altcoin become so low, your money will also become so low, from $1,000,000 to $500,000(maybe higher or lower). Both investing and saving money in bank is a good factor in making sure that your money is safe, but for me it is better to save your money in the bank, because many investing website online is scam, unlike bank that is definitely not a scam.