...It is never right to depend on anyone for investment. Always do your own research and then invest. Bitcoin is the best investment for investing in digital currency. If you invest by relying on someone, then you can get cheated in many cases, so always depend on yourself.
It's never right to depend on anyone or wait for a mentor to invest before investing but then one can see those big companies as a motivation to keep going, they can be like, if those big company can be dedicated to the DCA and stand firm on holding than selling then why can I as an individual do so with my discretionary fund to generate wealth or more wealth in future, so what am trying to say is that those big companies have a good role to play which is serving as a motivation to individual investors.
...If you are talking about big companies buying Bitcoin, then I must say that they must have announced it in some way before buying Bitcoin, if no one follows them and buys and sells Bitcoin, it is their personal matter. But for example, if we consider MicroStrategy, Metaplanet, XXI Capital, The Blockchain Group, all these mega Bitcoin holders, they can buy Bitcoin in any market and they will buy it and they will hold it for the long term. Of course, their Bitcoin buying system is DCA.
Everyone has their choice, some choose to invest for the future and watch their funds grow bigger on the long run while their are others who choose the quicker way but for someone who's chosen the part of investment especially Bitcoin then their are certain things the person shouldn't do, which is selling at the wrong time, I mean when they're still at the early stages of their investment journey. In the right sense one should consider that if someone that already has money is still investing to make more then why can I do same to become rich too in future, so far the person has a means of generating discretionary funds all it just takes is patience and if applied with a good strategy like DCA then they're good to go in the future, it might seem tough but easy if determined.