As for me, the most reliable coin for long-term storage is bitcoin. I was convinced of this in 2018. Now most of my capital is invested in bitcoin.
Your choice is very appropriate to entrust bitcoin as a place of investment. no need to hesitate with bitcoin because bitcoin has a high selling value and many people like it now so that bitcoin will be increasingly sought and will increase its value. my view of the best place of investment is two, namely BTC and ETH.
I also have the same thoughts, in my opinion good coins are bitcoin and ethereum, for the long term both have good prospects, investors of both coins are also very many, I am sure that in the future the prices of the two coins will be very high, if we holding it in the long run, I'm sure to get a lot of profit
Every one know about that Bitcoin and Ethereum is the best coins to hold the coin because we have seen already growth about these two coins. So there are some other potential coins like NEO, TRON, ICON, ADA BNB etc which has huge potential and with active developments.