The answer is just simple, we all are cowards 
. Everyone will like to wake up one day and find out that Btc has reached 50,000. All these people are scared to invest hugely in bitcoin but want to become Crypto millionaire and Billionaire. You ask them why they are scared and they are like crypto is volatile and so on. This is the time to set the record straight make people realize what they are into. If you are scared then there is no need for you to join this amazing fraternity .
Most people are far from being cowards, they simply have another vision of what is happening and try to diversify the risks. . Everyone will like to wake up one day and find out that Btc has reached 50,000. All these people are scared to invest hugely in bitcoin but want to become Crypto millionaire and Billionaire. You ask them why they are scared and they are like crypto is volatile and so on. This is the time to set the record straight make people realize what they are into. If you are scared then there is no need for you to join this amazing fraternity .Yes, bitcoin seems to be the most reliable investment among all cryptos, but it will take too much time for one to wake up a millionaire.
That's why many investors prefer a faster way to become rich by trading alts.