I agree when you say newbies should focus more on maintaining Bitcoin investment, there is need for investment to get matured before thinking about diversification, Bitcoin is less risky and requires more portions for holding so when the bull season comes it will give huge returns, Bitcoin hardly does X1000 like some of this projects does, this is the need why some investors choses to diversify.
Your kind words may be the one that gets it wrong or doubts Bitcoin and invests in shitcoins. Bitcoin investments hardly provide x1000 returns, but other coins do. Perhaps you missed the disadvantages of other coins that can easily give x1000. One cannot lose money by investing in Bitcoin, but one may lose their hard-earned money in a minute by investing in coins that can provide x1000 returns. But remember that we are only discussing Bitcoin in this thread; do not advise anyone to invest in a coin that will easily provide them with x1000 returns.
We are really not 100 % sure that our Bitcoin investment will bring profit because there's still a little bit of risk involved in Bitcoin investment whether long-term investment or short-term investment, so therefore I agree that bitcoin may not give someone the huge returns that most people expect it to actually give them.
There's high risk involve in investing in Altcoin and should be avoided a lot of it are even scam created to manipulate people.
Even though Bitcoin investing carries some risk, I believe there is a guarantee that one is going to profit a lot if they keep their investment for a long period. Don't be discouraged by saying that investing in Bitcoin cannot promise 100% profits; if you have yet to invest in Bitcoin, take some lessons from individuals who were successful and made huge profits in Bitcoin; they did not do so in a single day; you must hold for a long time and continue to accumulate as much as you can, and I believe you will realize that investing in Bitcoin provides 100% profits.