One of the major ways to become prepare to hold coins in long term is you must have another source of income. In general in crypto market, most of investors sell off their coins for want of money. They somehow manage money to invest, but do not have other sources of income to pay off the money borrowed to invest as they already suffer losses in the market.
for now investment in crypto currency with long-term investment or short-term investment has not been able to be done fully and become my side job and is not too focused because I have a reason the government in my country has not fully recognized the crypto currency as a valid currency and even still prohibits direct transactions with crypto currencies