Bitcoin is the king of cryptocurrency and I believe that anyone new in the cryptospace should start their bitcoin investment and focus on building their portfolio for the future and nothing more. I don't agree with you that there's anything like top shitcoins because they are all created for short term purpose. If you go and foolishly buy any shitcoin and feel that you are investing and keep holding for a long period of time, you will regret all through the rest of your life because your portfolio will depreciate overtime. Bitcoin is the opposite of shitcoin and don't feel that they're the same.
Bitcoin is limited in supply, censorship resistance, and beyond institutional control which give it more value and it's an asset that's a hedge to inflation because it's a store of value in the long run. This is why you see that more people are adopting it to save their funds from inflation due to the slowly debasement of dollar. Unserious people chase shitcoins because they prefer to gamble with their time, resources and energy.
Bitcoin is not a get rich quick scheme and needs proper planning and long-term commitment to invest and holding for long provided you are buying with your discretionary income. Fuck shitcoin and use this opportunity to stack up bitcoin for your future because a time is coming that shitcoiners will regret for not sticking solely to bitcoin when the price of bitcoin is very expensive and the value of your shitcoin bag is on a big loss.
You gave powerful and very common investment view that many people agree with. You are correct that Bitcoin limited supply and ability to resist censorship are reasons for what it is seen as long term store of value and good starting point for new investors. You are also right that most other cryptocurrencies are very risky and many experienced investors see them as gamble other than solid long term investment. Your approach of focusing on Bitcoin is very disciplined and logical way to build your portfolio for future.