The percentage of allocation can quite vary depending on individual circumstances, including questions about whether you have other investments, and surely if you are starting your first investment with bitcoin, then all that you are going to have is bitcoin and dollars, but if you are starting your investment with an already existing diversified portfolio (referring to traditional assets, not shitcoins), then you may well consider an initial target of 5% to 25% in bitcoin would be a good target.. for example, a guy who might come into bitcoin and already have $50k invested in index stocks or something like that... then he might consider an initial target of 5% to 25% in bitcoin would be something like $2,500 to $12,500 - but then if his allocation in bitcoin grows based on bitcoin growing rather than his putting more into bitcoin, then he may well consider how to treat that growth and whether it is worth it to allocate in other assets or just grow his bitcoin portion until it reaches some kind of a meaningful size..

so if his annual income/expenses might be in the ballpark of $40k per year, then maybe he is going to want to get his bitcoin holdings up to 1 or 2 years of his annual income/expenses prior to considering any kind of need to diversify into other assets.

For sure, these are not easy choices, but there are likely folks who might already have various kinds of traditional investments who decide to ONLY focus on bitcoin in terms of their new accumulations of investments, even though they surely might let their traditional investments ride.

Another problem is that some western countries have is the existence of 401k-like products, which are both tax free but also those products might have employer matching contributions, and so with those folks, they may be tempted to invest into those 401k-like products, and they might not even have a lot (if any) discretionary income remaining after they had already allocated to those 401k-like products (and which products are ONLY recently potentially getting bitcoin ETFs as one of the allocation options within them).

But, yeah, folks who do not have any of those employer and/or government-sponsored products, they may well come to investing and they may well start investing into bitcoin, and bitcoin is largely their only investment, so they are merely diversifying (or slightly de-risking) the amount of their BTC exposure by figuring out how much cash to keep.. so they are largely just BTC and cash, so they may well end up having 70% to 90% in BTC and the other part in cash and/or various kinds of cash alternatives (again not necessarily referring to shitcoins - even though some folks in poorer countries might not have a lot of investment options outside of the "crypto" space)....

..so then if the holdings in the overall investment portfolio are mostly just bitcoin and cash or cash equivalents, then at some point - maybe after 1-2 years worth of income and/or expenses is starting to build up into the BTC /cash holdings.. there may well be some concerns that the cash portions are not working enough.. so even though BTC is quite volatile, the BTC portion might still be considered as "working" so there may well. be some desires to have more of the cash portions to be working also, which in some senses justifies the concept of diversification into a variety of other assets.. maybe adding one new asset at a time ever year or every few years.. .... or there might be some other considerations that a person might have based on the investment options that he considers to be available to him.. and hopefully no more than 10% of the value of bitcoin will go into any shitcoins.. even though people have to make those kinds of choices for themselves based on their perceptions of options... and if they might consider whether they are able to invest in stocks, property, commodities, bonds or other forms of cash/cash equivalents.