Edit:
Drawing this (simple) diagram with pure tikz package directly in document is not so difficult. In this you need to do the following:
- define nodes style (color as parameter, size with
text width and align of multi line text with align=center (or flush center when you not liked eventual hyphenation of node's text)
- define distance between centers of the
planet and satellite node
- draw
satellite and arrows between \planetandsatelite`s nodes in loop, which determine color of satellites and text in it:
\documentclass[journal,comsoc]{IEEEtran}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\usepackage{caption}
\begin{document}
\begin{figure}
\centering
\begin{tikzpicture}[
planet/.style = {circle, draw=blue, semithick, fill=blue!30,
font=\large\bfseries,
text width=24mm, inner sep=1mm,align=center}, %<---
satellite/.style = {circle, draw=#1, semithick, fill=#1!30,
text width=16mm, inner sep=1mm, align=center},%<---
arr/.style = {-{Triangle[length=3mm,width=6mm]}, color=#1,
line width=3mm, shorten <=1mm, shorten >=1mm}
]
% planet
\node (p) [planet] {Features};
% satellites and connections
\foreach \i/\j [count=\k] in {red/K, cyan/A, purple/P, teal/Z, orange/lack of resistance, yellow/Q}
{
\node (s\k) [satellite=\i] at (\k*60:3.4) {\j};
\draw[arr=\i] (p) -- (s\k);
}
\end{tikzpicture}
\caption{Cycle of Interaction}
\end{figure}
\end{document}
which gives:

First version of answer:
Like this (reconstruction of showed image)?

For such diagrams is designed the smartdiagram package:
\documentclass{article}
\usepackage{smartdiagram}
\usetikzlibrary{arrows.meta}
\usepackage{caption}
\begin{document}
\begin{figure}
\smartdiagramset{
planet font=\large\bfseries,planet text width=28mm,
satellite font=\normalsize\bfseries, satellite text width=22mm,
distance planet-satellite=44mm,
/tikz/connection planet satellite/.append style={-{Triangle[length=3mm,width=6mm]},
line width=3mm},
}
\centering
\smartdiagram[constellation diagram]%
{
% text in the planet
Chaleneges of Blockchain,
% texts in satellites
Privacy, Authentication, Bandwidth, Bootstraping,
Usability, Data Malleability, Wasted Resources, Scalability%
}
\caption{Cycle of Interaction}
\end{figure}
\end{document}
or with six satellites with text given in your MWE:

\documentclass{article}
\usepackage{smartdiagram}
\usepackage{caption}
\begin{document}
\begin{figure}
\smartdiagramset{
planet font=\large\bfseries, planet text width=5em,
satellite font=\normalsize,
}
\centering
\smartdiagram[constellation diagram]%
{
% text in the planet
Features,
% texts in satellites
K, A, P, Z, MM, Q%
}
\caption{Cycle of Interaction}
\end{figure}
\end{document}
Addendum:
I overlooked which document class is used ... unfortunately smartdiagram doesn't work with IEEEtran document class (yet). To resolve this incompatibility there is two possibilities:
- draw above proposition with
standalone package and than import resulted pdf` file into document. For example:
\documentclass[tikz, margin=1pt]{standalone}
\usetikzlibrary{arrows.meta}
\begin{document}
\begin{tikzpicture}[
planet/.style = {circle, draw=blue, semithick, fill=blue!30,
font=\large\bfseries, inner sep=2mm},
satellite/.style = {circle, draw=#1, semithick, fill=#1!30,
minimum size=4em, inner sep=2mm},
arr/.style = {-{Triangle[length=3mm,width=6mm]}, color=#1,
line width=3mm, shorten <=1mm, shorten >=1mm}
]
% planet
\node (p) [planet] {Features};
% satellites and connections
\foreach \i/\j [count=\k] in {red/K, cyan/A, purple/P, teal/Z, orange/MM, yellow/Q}
{
\node (s\k) [satellite=\i] at (\k*60:3.2) {\j};
\draw[arr=\i] (p) -- (s\k);
}
\end{tikzpicture}
\end{document}
which generate image as shown the second example above and insert its pdf file (for example named cycle-smartdiagram) in your document as follows:
\documentclass[journal,comsoc]{IEEEtran}
\usetikzlibrary{arrows.meta}
\begin{document}
\begin{figure}[h!]
\centering
\includegraphics{cycle-smartdiagram}% or whatever name you select
\caption{Cycle of Interaction}
\label{fig:cycle}
\end{figure}
\end{document}
- draw this (simple) diagram with pure
tikz package directly in document (see edit on the top of answer)