you should be owning bitcoins already long before the bullish cycle to really maximize the profit you can get
This isn't a must, even if you don't own bitcoins before the bullish cycle, you can still start accumulating Bitcoin from wherever you joined using one or more of the accumulation strategies like lump sum, DCA and buying the dip.
Luckily we're at a dip now and any investor that uses now as their entry point is at a gain because the dip has presented him the opportunity to purchase more stashes of Bitcoin at a cheaper price. Be sure to purchase Bitcoin with your discretionary income
Bitcoin is aimed at the long-term, and not just a short-term or quick profits activity, it's important you build your backup funds like emergency fund and various variances of backup funds so you'll not have to tamper your holdings before maturity.
Yeah you are right one can still start now and become successful, you are also right now that Bitcoin is in dip anyone who has the finance to accumulate Bitcoin should do that, some set of people are panicking about this Bitcoin dip I really don't see any reason why people will be panicking on this dip like I always say this is not the first time dip is happening in Bitcoin so why the panic, lack of knowledge about the history of Bitcoin growth is actually what is causing this panic because those who knows the history of Bitcoin growth won't panic because they know Bitcoin has been going through this since it's creation and still it keeps growing, this is not a time to panic this is the right time to accumulate more Bitcoin with less price, is a big opportunity for everyone, and yeah just like you said accumulate Bitcoin using your Discretionary income the reason for these is so you won't find yourself going broke and in other to settle your bills it leads you to dip hands into your Bitcoin investment there by slowing down your accumulation journey so use only your Discretionary income, you gave a very good advise by saying one should also build there backup funds, is very important because without it you will surely dip hands into your Bitcoin when emergency comes but if you have it emergency won't lead you to dip hands into your Bitcoin because you will be able to use your backup funds to settle it.