Some new investors may be encouraged to invest in other cryptocurrencies without increasing their Bitcoin investment because they do not have enough money. But if they plan to do DCA, they can only hold Bitcoin regularly. Applying this strategy, an opportunity will be created for long-term holding, which can make the investor profitable.
Diversification when your Bitcoin investment is fueled with quack aggressiveness is a very big mistake newbies are lured to make. Before you can even think of gambling some part of your discretionary income on altcoins or shitcoins, you should make sure your aggressiveness in Bitcoin accumulation is something you're proud of and you've accumulated a decent amount of BTC.
I don't support a newbie to even distract himself by meddling into any other things but Bitcoin. Until you have accumulated a descent stash of BTC, entertaining that gamble might pose a threat to your investment. A newbie, especially those who are entirely new to investing have a lot to learn in Bitcoin accumulation like setting some part of their discretionary income as emergency funds and other variances of backup funds and striving to reach the maturity of being consistent and committed with your Bitcoin purchases and may lead to improper management of your cashflow.
For those who are interested in lump sum investments, it can be difficult to hold Bitcoin for the long term. They may sell Bitcoin for a small profit, but those who plan for the long term by doing DCA can be a strong holder. Stress free investing can certainly give the investor many advantages in holding it for the long term.
Your accumulation strategy does not determine the longevity of your investment, instead it's your discipline, determination and dedication that sustains your portfolio. The goal is to accumulate more stashes of Bitcoin, so your accumulation strategy does not matter as long as you're continually buying Bitcoin with your discretionary income and accumulation target in mind without tampering with your portfolio.
Although I'll not advise a newbie to wait for the dip, a newbie should start accumulating Bitcoin straight up and plan to continue increasing their portfolio with by lump summing or DCA or better if more funds are available, the newbie can choose to lump sum and follow up with DCA to further increase his portfolio.