Be clear about what you mean by the wrong funds.
I think that when you here of the statement "investing with the wrong fund" the person may be talking about someone that is investing away from his discretionary income.
Use a significant portion of your discretionary income to invest in Bitcoin and keep the rest available for emergency funds and extras.
Your investment may have problem along the way of your investment, because like that you are being over aggressive towards your accumulation. So dividing your discretionary income into three different equal part is the best, one for investment, one for your back up funds and one for discretionary consumption, with that you can invest smoothly without problem.
@cxtreenal said to keep a large portion of discretionary income in Bitcoin, but that's not to say it's overly aggressive. He also said to keep the rest for emergency funds and other things.
The share of discretionary income will not be the same for everyone. If someone already has a cash reserve for needs, they may be able to put more into Bitcoin than their new discretionary income. Again, if you have absolutely zero backup or your income is irregular, you may need to put more into your cash reserve or emergency fund. What is overly aggressive for you may be normal for someone else.