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As much as I love to agree with you because you are sure right, I would also say that it's not easy or even possible to buy bitcoin, withdraw them to a wallet and purposely forget about it, I am doing saying it's not doable, but this will require someone who has another good and reliable source of income, because it is only possible to forget about money in the bank when the person has much more than enough cash in his hands to carter for all of his or her need for a very long period of time.
But all the same though, this is a very good advice but only for those who already have other good and reliable source of income to depend on, not for those who may likely buy bitcoin today and expect it to x10 by tomorrow so they can sell and make some profits.
One of the primary things you'll do to secure your investment is having a steady source of income and building backup funds, this is important since you'll have to sustain your accumulation journey from it. Again, having an accumulation target and a purpose which the stated bitcoins you're accumulating would serve for you on the long-run keeps you going since you've a target.
One thing that makes it difficult to forget your coins intentionally is if you're overly disturbed by the noise from the market volatility, media propagandas and other side distractions. Investors who are committed to their accumulation journey pays less attention to media and market distraction, furthermore used the market to their advantage perhaps when dips present themselves in course of their regular accumulation.
If you're focused on your accumulation target, consistency and commitment and overall your purpose of accumulating Bitcoin, I think you'll be able to buy, consolidate and withdraw to wallets for storage without much problems or contemplations.