To avoid selling we need to strategize and plan our investment properly and not invest money we intend to use for other things and we should always set aside emergency funds to cater for unexpected expenses to avoid liquidating assets prematurely but most investors take it for granted and feel it’s not a necessity.
So, a investor will be successful only when our holding is long-term, so if we can hold for a long time through DCA with discipline and patience, we can definitely achieve big profits. And for this, we must make strategic decisions, and start holding with proper planning, and must keep emergency funds in the account, so that if we face unexpected expenses, we do not face any problem like stopping the holding.
Maybe best not to associate cryptocurrencies with Bitcoin and be specific directly if you mean in this statement about Bitcoin. We are discussing Bitcoin here and best not to insert anything about other altcoin since for sure that no people will bother to buy those crypto thoughts since people are in focus with their Bitcoin investment. Mentioning cryptocurrency can mislead people, so don't associate with other coin so that people will get directly on what coin you are pointing here.
One solution for them to eliminate those fear what you have mention is to erase any trading thoughts in their mind. If they set up straight up goals like sealed their Hodl plans for sure that they would never worries those pump and dump situation.