From what you have put down here they are all correct but then I am not compromising the truth that 1 - 4 years is long time investment yes way back or far back such investment plan is a short time investment and not even now and I won't adhere to it to fully accept is a long time investment projection for someone to hold as long time investment and of curse not everyone who would understand that 1-4 years is relatively a short time investment and those who weren't a Bitcoiner (newbie invest) may not consider it as short time except you and I know who knows how bitcoin investment works.
It is short term because if you buy during this duration of time and want to make profit, it is a big risk that you are taking since no one can predict the price movement of bitcoin correctly. This is why the basic of bitcoin investment is to invest in a long term, at least one complete circle and above to minimize the risk of bitcoin volatile nature. Ok imagine that you bought bitcoin at 25k last year and bitcoin price is 40k, you sold and cash out making profit unknown to you that the next month bitcoin price will hit 50k and you are with your fiat. If the price hits 50k and above to 100k, you will regret your actions of taking profit early and no matter that you made profit, you will still be blaming yourself because you don't have the opportunity to buy back. There are so many scenarios that will play out that make 1-4yrs time unethical to invest in bitcoin.
If you read my post correctly you would understand how I said that it's only for those who wants to double their money or who can't endure for long periods of investment normally 4-10 years and above can be considered as Long time investment even though such person is impatient enough to have hold for such period it will only end up wasting their useful bitcoin because of lack of patients or wanting to increase their profits without adequately seeking to hold for long time.
Of course when they sold at cheap price they end up regretting their investment as I can say that bitcoin isn't that predictable based on price movement and differences and of a true 10 year can be considered a sufficient time period for one to hold his bitcoin except for someone that is greed to make some profits while they proceed their holding processes, that result in decreasing the total amount of Bitcoin in their custody.