You can leverage risks by adding more coins to your portfolio. Sticking to only one coin will increase your risk of loss if it goes all the way down the drain in an instant. I've seen many times where Bitcoin goes down, while some altcoins go up in price. If you diversify your investment into Bitcoin and other prominent cryptocurrencies on the market, you'll be able to minimize losses as much as possible.

Ultimately, the decision lies in yourself whenever you'd want to diversify your investment or put all of your "eggs" in one basket. Bitcoin should be the cryptocurrency on the top of your portfolio, since it's the one who moves the whole market. With a block reward halving every 4 years, Bitcoin is on a road towards non-stop growth both in price and mainstream adoption. The cryptocurrency is valued at nearly $40k now, and could be worth more than $100k in the future. Whatever you do with your money, always invest wisely in order to avoid becoming bankrupt in the long run. Who knows how much profit you'll make with the next bull market run? Just my thoughts

That investment "plan" works only for really young people or for not so smart

I'm now all in BTC and haven't sold a bit since 2013. I have a few Litecoins left somewhere but too few to mention.

I know putting all eggs in one basket is not very wise but I don't feel like investing in anything else right now. Is this a risky move? Maybe yes, maybe not.

I plan HODLing more, might sell a small percentage around November when odds say BTC might boost like crazy.

What's your plan?

That's basically correct, but there are more solid coins than just Bitcoin that you could certainly add to your portfolio. You could add an anonymous coin and also a smart contract platform and still be good to go. If you hold BTC, ETH and XMR I would say that is a solid portfolio. Maybe add a small percentage of lower cap coins to enjoy the potential thrill when one of those coins goes to the moon!

I am holding BTC and altcoins also but i don't put all my eggs in a  basket. Last couple of weeks is good for Bitcoin and i hope till November, BTC will experience its ATH but at the same time altcoins will also chase Bitcoin. So i like to put 30%-40% in BTC and the rests are for altcoins like ETH, DOT, CAKE, BABY, KICK, TRX, KSUMA, ONT etc. After all, we have to remember that Bitcoin was only below $5. So only who are holding BTC till now aren't in wrong decision, rather they are gainers form the perspective of the day. So, in the long run, it's okey for only hold BTC.

its not just BTC that institutions are buying nowadays, they are also accumulating ETH if you have not heard of it. even Reuters is reporting it because they know ETH is going to follow what BTC had become. this year alone ETH had spiked up to $4,370 because it indeed has usecase which they could make them more money. there was an interview that even Grayscale has ETH on their balance sheet. they are diversifying investments because they don't just put their eggs in one basket.