The most important thing is to start consistently, not the amount of Bitcoin. To start any investment, you should first have money, sufficient knowledge, or absolutely perfect market conditions.
Whether you are a pensioner, a student, a low-wage earner, or someone who has something in hand at the end of the month you can still be a successful investor in the world of Bitcoin—if you are consistent.
For those who have a long-term view of Bitcoin investments, the main objective should be to hold on to time. Whether big or small, this is your real capital. You need to see each day, each week, or each month as an opportunity—not in the light of market momentum or news. Small steps make a big difference in the long run.
Obviously there is nothing like absolute perfect market condition, if you want to invest in Bitcoin, every market condition in Bitcoin is perfect for investment as the market price is not on a fixed deposit, what investors do is to see through this conditions and go ahead with their investment plan. However I totally agree with you on the other points you made concerning the strata of persons that should get involved in Bitcoin investment as it's open for all determine persons and the idea of starting from the cradle consistently.
I agree with you, we should never lag behind in investing in Bitcoin, because in the future the price of Bitcoin may be higher, then you may regret because you wanted to invest in Bitcoin but you did not because you were waiting for the fall of Bitcoin, just as time runs according to its rules, we have to give due importance to time, if this important time of ours passes once in the future we will consider the present time as history, so in this case it is better to invest in Bitcoin to illuminate our present, in this we can take a step for the future that can increase our wealth several times, so you have to be properly aware to invest because you have time, you have to give importance otherwise you will lag behind, time will get ahead of you or the more the price of Bitcoin increases, the more you will wait for its fall which is a bad habit so you should be aware now.